Adjusted Body Weight Calculator
Calculate adjusted body weight (AjBW) from actual weight, Devine ideal body weight, and a selected correction factor commonly used in dosing and nutrition workflows.
Free Health & Fitness Calculators
692 toolsUse our health and fitness calculators to understand your body better. From BMI and calorie needs to macro splits and training metrics, these tools help you make informed wellness decisions.
Body Metrics
17 calculatorsBMI, ideal weight, BMR, TDEE, and body measurement calculators.
Ape Index Calculator
Calculate the ratio and difference between arm span and height for a quick body-proportion comparison.
BMI Calculator
Calculate your Body Mass Index (BMI), see your WHO weight category, healthy weight range for your height, and understand what your BMI means for your health.
BMI Prime Calculator
Free BMI Prime calculator. Calculate your BMI Prime ratio — a normalized version of BMI where 1.0 is the upper limit of normal weight — for a clearer picture of your weight status.
BMR Calculator — Cunningham Equation
Calculate your Basal Metabolic Rate using the Cunningham equation, a lean-mass-based estimate often used for athletes and highly active individuals.
BMR Calculator — Harris-Benedict Equation
Calculate your Basal Metabolic Rate using the revised Harris-Benedict equation (1984). Estimate daily calorie needs at rest for weight management and nutrition planning.
BMR Calculator — Katch-McArdle Formula
Calculate your Basal Metabolic Rate with the Katch-McArdle formula using lean body mass. Useful for individuals who know their body fat percentage. Includes TDEE estimates.
BMR Calculator — Mifflin-St Jeor Equation
Calculate your Basal Metabolic Rate using the Mifflin-St Jeor equation, a widely used BMR formula for the general population. Get TDEE estimates for standard activity levels.
Healthy Weight Range Calculator
Find the adult BMI-based healthy weight range for your height in pounds, kilograms, and category context.
Ideal Body Weight Calculator (Devine Formula)
Calculate your ideal body weight using the Devine formula — the most commonly used IBW calculation in clinical medicine for drug dosing, nutrition planning, and tidal volume estimation.
Ideal Body Weight Calculator (Hamwi Formula)
Calculate your ideal body weight using the Hamwi formula (1964). The oldest major IBW equation, widely used in clinical dietetics with the highest per-inch weight increment.
Ideal Body Weight Calculator (Miller Formula)
Calculate your ideal body weight using the Miller formula (1983). Gives the highest IBW estimates among the four major formulas — a more generous reference weight for your height.
Ideal Body Weight Calculator (Robinson Formula)
Calculate your ideal body weight using the Robinson formula (1983). A refined clinical IBW equation that gives slightly higher estimates than Devine for most heights.
Overweight & Underweight Threshold Calculator
Find the body weights at your height that line up with adult BMI cut-offs for underweight, overweight, and obesity.
TDEE Calculator — Total Daily Energy Expenditure
Calculate your Total Daily Energy Expenditure (TDEE) using four BMR formulas. Get estimated calorie targets for weight loss, maintenance, and muscle gain based on your activity level.
Waist-to-Height Ratio Calculator
Calculate your waist-to-height ratio (WHtR) as a quick screening measure for central adiposity and cardiometabolic risk. A common rule of thumb is to keep waist below half your height.
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio (WHR) as a quick screen for abdominal fat distribution using common WHO action thresholds.
Body Composition
27 calculatorsBody fat percentage, lean mass, FFMI, and muscle mass calculators.
Army Body Fat Calculator
Calculate your body fat percentage using the U.S. Army tape test method (AR 600-9). Determine if you meet military body composition standards.
BMI Calculator for Kids
Calculate BMI for children ages 2–20 with CDC growth chart percentiles. Determine weight status using age-and-sex-specific pediatric standards.
BMI Calculator for Men
Calculate your BMI with male-specific interpretation, healthy weight range, estimated body fat, waist circumference risk, and calorie needs.
BMI Calculator for Teenagers
Calculate BMI for teenagers 13–19 with CDC age-and-sex-specific percentiles, weight status classification, and growth chart reference data.
BMI Calculator for Women
Calculate BMI for women with female-specific body fat estimation, waist-to-hip ratio, cardiovascular risk assessment, healthy weight range, and calorie needs.
BMI in Pregnancy Calculator
Calculate your pre-pregnancy BMI and track recommended weight gain by gestational week using IOM and ACOG guidelines for healthy pregnancy.
BMI Weight Loss Goal Calculator
Set a target BMI and calculate exactly how much weight to lose, how long it will take, and the daily calorie deficit needed to reach your goal safely.
Body Adiposity Index (BAI) Calculator
Calculate your Body Adiposity Index to estimate body fat percentage without a scale. Uses hip circumference and height with the original Bergman formula.
Body Density Calculator
Calculate body density from skinfold measurements and convert to body fat percentage using the Siri and Brozek equations.
Body Fat Calculator (3-Site Skinfold)
Estimate body fat percentage using the Jackson-Pollock 3-site skinfold method. Enter caliper measurements from three body sites for an accurate body composition estimate.
Body Fat Calculator (7-Site Skinfold)
Estimate body fat percentage with the Jackson-Pollock 7-site skinfold method. The most comprehensive caliper test using chest, midaxillary, triceps, subscapular, abdomen, suprailiac, and thigh.
Body Fat Calculator (Navy Method)
Free body fat percentage calculator using the U.S. Navy method. Estimate body fat from neck, waist, and hip circumference measurements — no special equipment needed.
Body Shape Calculator
Determine your body shape type — hourglass, pear, apple, rectangle, or inverted triangle — using bust, waist, and hip measurements with health risk analysis.
Body Surface Area (BSA) Calculator
Calculate body surface area using six formulas — Du Bois, Mosteller, Haycock, Boyd, Gehan, Fujimoto — with comparison table and clinical dosing reference.
Body Water Percentage Calculator
Estimate total body water with the Watson formula. View body-water percentage plus approximate intracellular and extracellular fluid splits for reference.
FFMI Calculator — Fat-Free Mass Index
Calculate your Fat-Free Mass Index (FFMI) and normalized FFMI to assess muscularity relative to height. Scores above 25 are extremely rare for natural athletes. Includes classification table.
Gastric Sleeve Weight Loss Calculator
Project expected weight loss after vertical sleeve gastrectomy (VSG) by month — %EWL, %TWL, projected BMI, timeline, and comorbidity resolution rates.
Geriatric BMI Calculator
BMI calculator for adults 65+ with geriatric-specific ranges, obesity paradox context, mortality risk table, frailty screening, and protein/calorie targets for elderly.
Healthy Weight in Pregnancy Calculator
Track pregnancy weight-gain ranges using IOM guidance, with weekly targets, calorie context by trimester, gain status, and a reference breakdown of common weight components.
Height Estimation Calculator for Bedridden Patients
Estimate adult height from knee height, arm span, ulna length, or demispan when standing measurement is not available.
Lean Body Mass Calculator
Calculate your lean body mass using 3 established formulas (Boer, Hume, James). Compare results to understand your fat-free weight including muscle, bone, and organs.
Maximum Muscular Potential Calculator
Compare several popular natural-muscle-potential heuristics based on height, frame size, and training age. These outputs are rough ceilings, not validated individualized limits.
Overweight & Obesity Risk Calculator
Comprehensive overweight assessment with BMI, waist circumference risk, healthy weight range, 5% and 10% weight loss benefits, disease risk table, and calorie deficit planning.
Relative Fat Mass (RFM) Calculator
Calculate Relative Fat Mass from height and waist circumference using the original Woolcott and Bergman formula. RFM is a waist-based estimate of body fat percentage, not a direct measurement.
Skeletal Muscle Mass Calculator
Estimate skeletal muscle mass with the Lee et al. equation using sex, age, height, weight, and ethnicity inputs.
Visceral Fat Estimate Calculator
Estimate a waist/BMI/age-based visceral-fat proxy score and review abdominal-risk context from common waist thresholds.
Weight Week-by-Week Planner
Plan your weight loss or gain with a week-by-week timeline showing adaptive calorie targets, BMI changes, milestones, and rate sustainability guidance.
Anthropometrics
10 calculatorsBody surface area, frame size, somatotype, and body index calculators.
A Body Shape Index (ABSI) Calculator
Calculate your A Body Shape Index (ABSI) from waist circumference, BMI, and height. ABSI provides a body-shape reference that has been studied alongside mortality risk.
Abdominal Volume Index (AVI) Calculator
Calculate your Abdominal Volume Index from waist and hip circumference. AVI provides a geometric abdominal-volume estimate from tape-measure inputs.
Body Frame Size Calculator
Determine your body frame size (small, medium, or large) using the wrist circumference method and elbow breadth method. Adjust ideal weight targets based on frame size.
Body Surface Area (BSA) Calculator
Calculate body surface area using Du Bois, Mosteller, Haycock, Gehan-George, and Boyd formulas. Compare BSA results across common clinical reference methods.
Body Type Classifier — Somatotype Calculator
Classify your body type using the Heath-Carter somatotype method. Calculate your endomorph, mesomorph, and ectomorph scores from body measurements. Includes somatotype chart.
Broca Index Calculator
Calculate your ideal body weight with the Broca Index — one of the oldest and simplest height-to-weight formulas. with sex adjustments.
Conicity Index Calculator
Calculate the Conicity Index to describe abdominal adiposity relative to body size. Uses waist circumference, weight, and height as a geometric reference.
Corpulence Index Calculator
Calculate the Corpulence Index (CI) — a height-cubed body-mass index related to the Ponderal Index. Compare CI with BMI for an alternative body-build assessment.
Ponderal Index Calculator
Calculate your Ponderal Index (PI) — mass divided by height cubed. PI is a proportionality reference used in adult and neonatal assessment.
Rohrer Index Calculator
Calculate the Rohrer Index (mass/height³) for pediatric and adult body proportionality assessment. Includes classification tables for interpretation.
Nutrition
41 calculatorsMicronutrient, nutrient density, and dietary analysis calculators.
Bicarbonate Deficit Calculator
Estimate bicarbonate deficit from body weight, current bicarbonate, target bicarbonate, and distribution-volume assumptions in an educational worksheet.
BMR Calculator
Calculate your Basal Metabolic Rate using Harris-Benedict, Mifflin-St Jeor, Katch-McArdle, and Cunningham equations. Estimate TDEE for weight goals.
Breastfeeding Calorie Calculator
Calculate daily calorie needs while breastfeeding. Accounts for milk production energy cost, activity level, and safe postpartum weight loss targets.
Calcium Intake Calculator
Calculate your daily calcium requirement based on age, sex, and health factors. Includes RDA targets, upper limits, food source tracker, and vitamin D synergy guidance.
Calorie Calculator
Estimate your daily calorie needs (BMR and TDEE) based on age, gender, height, weight, and activity level. Get targets for weight loss, maintenance, and muscle gain.
Carbohydrate Needs Calculator
Calculate your optimal daily carbohydrate intake based on body weight, activity level, and fitness goals. Includes meal distribution and food source reference.
Carboplatin AUC Dosing Calculator
Calculate carboplatin dose using the Calvert formula with AUC targeting. Supports measured GFR or Cockcroft-Gault CrCl estimation with FDA GFR capping.
Cholesterol Unit Converter
Convert cholesterol and triglyceride values between mg/dL and mmol/L. Full lipid panel conversion with risk assessment and reference ranges.
Corrected Sodium Calculator for Hyperglycemia
Calculate corrected sodium for hyperglycemia using Katz (1.6) and Hillier (2.4) correction factors. Essential for DKA and HHS sodium assessment.
Daily Fat Intake Calculator
Calculate your optimal daily fat intake by body weight and diet type. Includes saturated fat limits, omega-3 targets, and food source reference table.
Daily Fiber Intake Calculator
Calculate your recommended daily fiber intake by age, sex, and health goals. Includes soluble vs. insoluble targets and high-fiber food source reference.
Daily Protein Intake Calculator
Calculate your optimal daily protein intake based on weight, body fat, activity level, and goals. Includes per-meal targets, leucine thresholds, and food source reference.
Daily Value Percentage Calculator
Calculate the percentage of Daily Value (%DV) for any nutrient based on FDA reference values. Customize for your calorie target.
Daily Vitamin & Mineral Needs Calculator
Find your recommended daily intake for 18 essential vitamins and minerals based on age, sex, pregnancy, and lactation. Includes upper limits and deficiency signs.
DKA Severity & Lab Worksheet
Review common DKA severity criteria, anion gap, corrected sodium, osmolality, and related lab context in a single severity worksheet.
Electrolyte Needs Calculator
Estimate daily electrolyte needs for sodium, potassium, and magnesium based on activity level, sweat rate, climate, and diet. Built for hydration planning and comparison.
Fiber Intake Calculator
Calculate your recommended daily fiber intake based on age, sex, and calorie consumption. Learn about soluble vs insoluble fiber with food source guidance.
Food Calorie Density Calculator
Calculate the calorie density (calories per gram) of any food. Compare foods by energy density and find high-satiety, low-calorie options for weight management.
Glycemic Load Calculator
Calculate glycemic load from glycemic index and available carbohydrate per serving, with low, medium, and high GL reference bands.
Iron Intake Calculator
Calculate your daily iron requirement based on age, sex, diet type, and health factors. Includes RDA targets, vegetarian adjustments, and iron-rich food sources.
IV Fluid Sodium Change Calculator
Estimate serum sodium change from IV fluid infusion using the Adrogue-Madias formula across common crystalloid and hypertonic fluids.
Keto Macro Calculator
Calculate your ketogenic diet macros for fat, protein, and net carbs. Supports SKD, TKD, CKD, and high-protein keto protocols with personalized calorie targets.
Macro Calculator
Calculate your optimal daily macronutrient split — protein, carbohydrates, and fat — based on your calorie target and diet type. Get grams and calories for each macro.
Maintenance Calorie Calculator
Estimate maintenance calories using 4 BMR equations. Includes TDEE, macro breakdown, meal split, and calorie goals for cutting and bulking.
Meal Prep Portions Calculator
Calculate meal prep portions, macros per container, and grocery quantities. Scale recipes for any number of servings and days.
Metabolic Syndrome Risk Calculator
Assess metabolic syndrome risk using ATP III and IDF criteria. Enter waist, blood pressure, glucose, triglycerides, and HDL to check all 5 diagnostic criteria.
Micronutrient Daily Needs Calculator
Find your recommended daily intake for 17 essential vitamins and minerals. Adjusted by age, sex, pregnancy status, and diet type with food source references.
Micronutrient Gap Finder Calculator
Identify vitamin and mineral deficiencies by comparing your daily intake to RDA targets. Find gaps and get food source recommendations.
Nutrient Density Score Calculator
Calculate a nutrient density score for any food based on vitamins, minerals, and fiber per calorie. Compare foods using an ANDI-style scoring system.
Omega-3 to Omega-6 Ratio Calculator
Estimate your omega-3 to omega-6 intake ratio from diet, compare it with commonly cited reference ranges, and review practical food-swap ideas.
Recipe Nutrition Scaler Calculator
Scale recipe ingredients and nutrition by serving multiplier. Adjust portions up or down while keeping the per-serving proportions intact.
Simple Daily Calorie Intake Calculator
Estimate daily calories for loss, maintenance, or gain with goal-based targets, a default macro split, and a simple food-reference view.
Sodium Correction Rate Calculator
Calculate sodium correction rate from serial labs and compare it with common 24h and 48h safety limits.
Sodium Deficit Calculator
Calculate total sodium deficit in hyponatremia and view common reference volumes for 3% NaCl, normal saline, and oral NaCl tablets.
Sodium in Salt Converter
Convert between sodium and salt (NaCl). Compare salt types, check food sodium content against daily limits, and convert mg, mEq, mmol, and teaspoons.
Sodium Intake Calculator
Calculate your recommended daily sodium intake based on age, health status, and activity level. Includes AHA guidelines, athlete adjustments, and food sodium tracker.
Sugar Intake Calculator
Calculate your recommended daily sugar limit based on calorie intake using WHO and AHA guidelines. Convert between grams, teaspoons, and percent of calories.
Urine Protein-to-Creatinine Ratio Calculator
Calculate spot urine protein-to-creatinine ratio (PCR) and albumin-to-creatinine ratio (ACR) as a proteinuria screening and trend worksheet, with estimated 24-hour context.
Vitamin A Intake & Conversion Calculator
Convert vitamin A between IU, mcg RAE, and beta-carotene. Check intake against RDA and upper limits. Covers retinol, carotenoid sources, food content, and toxicity thresholds.
Vitamin D Needs Calculator
Calculate your daily vitamin D requirement based on age, sun exposure, latitude, skin tone, and health conditions. IOM and Endocrine Society guidelines supported.
Water Intake Calculator
Calculate how much water you should drink daily based on body weight, activity level, and climate. Personalized hydration targets in liters, ounces, and cups.
Calories
10 calculatorsDaily calorie needs, deficit, surplus, and calorie tracking calculators.
Alcohol Calories Calculator
Calculate exact calories from alcoholic drinks including ethanol and mixer calories. Covers beer, wine, spirits, cocktails, and mixed drinks.
Calorie Deficit Calculator
Calculate your daily calorie deficit for weight loss. See how much to eat below your TDEE and estimate your fat loss timeline.
Calorie Per Ingredient Calculator
Calculate total recipe calories by adding ingredients and their weights. Built-in food database with 50+ common ingredients for quick lookup.
Calorie Surplus Calculator
Calculate how many extra calories you need to eat above your TDEE for muscle gain. Plan a lean bulk with the right surplus size.
Cheat Meal Impact Calculator
Calculate how a cheat meal affects your weekly calorie balance and fat loss timeline. See the real impact in context of your weekly deficit.
Daily Calorie Needs Calculator
Calculate how many calories you need per day based on age, sex, weight, height, and activity level. Get your TDEE with goal-based adjustments.
Meal Calorie Calculator
Calculate the total calories in any meal by adding ingredients with their serving sizes. Get per-serving breakdown with protein, carbs, and fat totals.
Metabolic Adaptation Calculator
Estimate how much your metabolism has slowed during dieting. Compare predicted BMR vs. actual to quantify adaptive thermogenesis.
Restaurant Meal Estimator Calculator
Estimate calories and macros in restaurant meals by cuisine type, portion size, and cooking method. Works for fast food, casual dining, and fine dining.
Thermic Effect of Food (TEF) Calculator
Calculate the calories burned digesting protein, carbs, and fat. See how a high-protein diet increases your TEF and net calorie expenditure.
Macronutrients
4 calculatorsProtein, carb, fat macro split and IIFYM calculators.
IIFYM Calculator (If It Fits Your Macros)
Calculate flexible macro targets from an estimated TDEE, with adjustable protein, fat, and carbohydrate ranges for different goals.
Macro Calculator (Protein/Carb/Fat Split)
Calculate your daily macronutrient targets in grams. Choose from preset macro splits or customize your protein, carb, and fat percentages.
Net Carbs Calculator
Calculate net carbs by subtracting fiber and selected sugar-alcohol adjustments from total carbohydrates for low-carb meal planning.
Protein Intake Calculator
Calculate how many grams of protein you need per day based on body weight, activity level, and fitness goals. ISSN-backed recommendations.
Diet Plans
12 calculatorsKeto, intermittent fasting, zone diet, and structured diet calculators.
Anti-Inflammatory Diet Score Calculator
Calculate your Dietary Inflammatory Index (DII) score based on daily food intake. Assess whether your diet promotes or reduces chronic inflammation.
Calorie Cycling Calculator
Create a zig-zag calorie plan with variable daily intake while keeping your weekly average on target. Compare flat vs. cycled approaches.
Carb Cycling Calculator
Plan your high, medium, and low carb days around your training schedule. Redistribute weekly carbs for optimal performance and fat loss.
DASH Diet Score Calculator
Calculate your DASH Diet Adherence Score based on daily food group servings. Assess how well your diet follows the NIH-recommended DASH eating plan.
Fasting Calorie Burn Calculator
Estimate energy use over a fasting window using BMR, duration, activity, and broad phase assumptions. Includes an illustrative breakdown of total calories and fat-linked energy.
Intermittent Fasting Window Calculator
Plan a daily time-restricted eating schedule with standard or custom fasting windows. Generates eating and fasting times plus simple meal-time suggestions for routine planning.
Keto Macro Calculator
Calculate your ideal ketogenic diet macros — fat, protein, and net carbs — based on your TDEE, activity level, and body composition goals.
Mediterranean Diet Score Calculator
Calculate your Mediterranean Diet Adherence Score using the Trichopoulou scale. See how closely your eating pattern matches a widely studied Mediterranean-style diet.
Refeed Day Calculator
Plan strategic refeed days to boost leptin and metabolic rate during a diet. Calculate carb increases with proportional fat reductions.
Reverse Dieting Calculator
Plan a gradual calorie increase after dieting to restore metabolism without rapid fat gain. Generate a week-by-week reverse dieting timeline.
WW Points Equivalent Calculator
Estimate the points value of foods using a simplified formula based on calories, saturated fat, sugar, and protein. Unofficial estimate for educational purposes.
Zone Diet Block Calculator
Calculate your Zone Diet macros and daily block prescription based on body weight, activity level, and the 40/30/30 Zone ratio system.
BMR, TDEE, and calorie deficit tools.
Calculators coming soon.
One-rep max, pace, and heart rate calculators.
Calculators coming soon.
Weight Loss
22 calculatorsWeight loss timelines, deficit planning, and safe rate calculators.
BMI Change Tracker Calculator
Track your BMI over time and visualize category transitions from obese to overweight to normal. See how weight changes affect your BMI classification.
Body Fat Loss Timeline Calculator
Estimate a body-fat-loss timeline and compare how different pacing assumptions change the projected path to a target body-fat percentage.
Calorie Balance Calculator
Track your daily calorie balance: intake minus expenditure. See your net surplus or deficit and how it translates to weekly weight change.
Calorie Deficit for Weight Loss Calculator
Calculate the exact daily calorie deficit needed to reach your weight loss goal. Compares deficit sizes, timelines, and estimated weekly loss rates.
Goal Weight Timeline Calculator
Calculate exactly how long it will take to reach your goal weight with adaptive TDEE recalculation. Week-by-week projections that account for metabolic slowdown.
Ideal Race Weight Calculator for Runners
Calculate your optimal racing weight using the Stillman formula. See how body weight affects race performance with the 2-seconds-per-mile-per-pound estimate.
Mini Cut Calculator
Plan a short aggressive cut during a bulk phase. Calculate the optimal 4-6 week mini cut deficit, protein needs, and expected fat loss while preserving muscle.
Newborn Weight Percentile Calculator
Calculate your newborn's weight percentile using WHO growth charts. See where your baby falls compared to age and sex-matched peers from birth to 24 months.
Pet Weight Management Calculator
Calculate your dog or cat's ideal weight and daily calorie needs. Uses Body Condition Score (BCS) to estimate healthy weight and feeding guidelines.
Postpartum Weight Loss Timeline Calculator
Estimate a realistic postpartum weight-change timeline, with breastfeeding-related energy context and conservative pacing rather than bounce-back promises.
Safe Weight Loss Rate Calculator
Calculate your personalized safe weight loss rate based on body weight, body fat percentage, and health factors. WHO and medical guidelines applied to your situation.
Water Weight Loss Calculator
Estimate how much of your weight loss is water vs fat. Understand how sodium, carbs, and hydration affect the scale and set realistic expectations.
Wedding Weight Loss Planner Calculator
Plan safe weight loss for your wedding day. Get a personalized timeline with weekly milestones, calorie targets, and dress fitting checkpoints.
Weight Cut Calculator for Combat Sports
Estimate the size and timing of a combat-sports weight cut, compare it with common risk bands, and review broad rehydration planning context.
Weight Loss Competition Calculator
Calculate percentage-based scoring for weight-loss challenges so participants with different starting weights can be compared more fairly.
Weight Loss Health Improvement Calculator
See how weight loss improves your health markers. Estimate reductions in blood pressure, diabetes risk, cholesterol, and joint pain per percentage of body weight lost.
Weight Loss Percentage Calculator
Calculate what percentage of your body weight you have lost. Track medically meaningful milestones at 5%, 10%, and 15% loss thresholds.
Weight Loss Surgery Comparison Calculator
Compare bariatric surgery options: gastric bypass, sleeve gastrectomy, and gastric band. See expected weight loss, timelines, and eligibility by BMI.
Weight Loss Timeline Calculator
Calculate how long it will take to reach your goal weight with a week-by-week projection. Accounts for adaptive thermogenesis and slowing metabolism.
Weight Plateau Breaker Calculator
Re-estimate calorie needs after weight loss and review common plateau strategies such as intake changes, activity increases, refeeds, and diet breaks.
Weight Regain Predictor Calculator
Estimate factors associated with weight regain after weight loss based on maintenance habits, support, and weight-loss method. Offers rough 1- to 5-year scenarios rather than a validated personal forecast.
Yo-Yo Dieting Cost Calculator
Calculate the financial and metabolic cost of repeated diet cycles. See how yo-yo dieting impacts your wallet, metabolism, and long-term weight outcomes.
Weight Gain
6 calculatorsWeight gain plans, muscle gain timelines, and lean bulk calculators.
Bulk Comparison Calculator
Compare lean bulk vs dirty bulk outcomes. See projected muscle gain, fat gain, and body composition changes over 3, 6, and 12 months.
Child Growth Percentile Calculator
Calculate your child's weight, height, and BMI percentiles using WHO and CDC growth charts. Track growth from birth to age 20 with age and sex-matched comparisons.
Lean Bulk Calculator
Calculate optimal calories and macros for a lean bulk. Find your surplus, protein target, and projected muscle vs fat gain for clean bulking.
Muscle Gain Timeline Calculator
Estimate your muscle gain potential over time using the Lyle McDonald model. Year-by-year projection based on training experience and genetic factors.
Rehydration After Weigh-In Calculator
Estimate a post-weigh-in rehydration worksheet for combat-sport scenario planning, including fluid, sodium, and carbohydrate targets.
Weight Gain Plan Calculator
Calculate daily calorie surplus needed to gain weight safely. Plan your weight gain timeline with weekly targets for muscle building or underweight recovery.
Body Recomposition
6 calculatorsBody recomposition, maintenance calories, and weight fluctuation calculators.
Before & After Body Fat Calculator
Compare estimated body fat change between two time points. Review how fat mass, lean mass, and body-fat percentage shifted over time.
Body Recomposition Calculator
Plan simultaneous fat loss and muscle gain with calorie and protein targets. Estimate body composition changes over 12-24 weeks of recomposition.
Deload Weight Fluctuation Calculator
Estimate short-term scale changes during a deload week from glycogen, water, and reduced activity.
Maintenance Calories Calculator
Estimate your maintenance calorie level (TDEE) with multiple methods. Includes NEAT variation ranges and macro planning references.
Seasonal Weight Fluctuation Calculator
Estimate natural weight changes by season. See how winter holidays, summer activity, and seasonal patterns affect your weight throughout the year.
Set Point Weight Calculator
Estimate a plausible defended weight range from weight history and lifestyle factors. Educational set-point and settling-point reference only.
Strength Training
19 calculatorsOne-rep max, Wilks score, training volume, and strength standards calculators.
5/3/1 Lifting Program Calculator
Calculate your Wendler 5/3/1 training maxes, weekly sets, reps, and percentages for squat, bench, deadlift, and overhead press.
Bench Press Pyramid Calculator
Generate ascending, descending, and full pyramid bench press workout sets with exact weights, reps, and volume tracking.
Bench Press Standards Calculator
Compare your bench press to strength standards by bodyweight, sex, and experience level. See if you rank beginner, intermediate, advanced, or elite.
Bodyweight Exercise Equivalent Calculator
Estimate weighted-exercise equivalents for common bodyweight movements and vice versa. Compare push-ups, pull-ups, dips, and similar patterns with familiar gym references.
Deadlift Standards Calculator
Compare your deadlift to common strength standards by bodyweight, sex, and experience level. See where it falls on a beginner-to-elite benchmark scale.
DOTS Score Calculator
Calculate your DOTS score for powerlifting. DOTS is a modern bodyweight-adjusted formula designed to reduce some Wilks-era bias at very light and very heavy bodyweights.
IPF GL Points Calculator
Calculate your IPF Goodlift (GL) Points for powerlifting. The official IPF formula with separate coefficients for classic (raw) and equipped lifting.
One Rep Max Calculator (Brzycki Formula)
Estimate your one rep max using the Brzycki formula. More conservative than Epley at higher reps. Enter weight and reps for your 1RM prediction.
One Rep Max Calculator (Epley Formula)
Estimate your one rep max using the Epley formula from the weight lifted and reps completed in a submaximal set.
One Rep Max Calculator (Lombardi Formula)
Calculate your 1RM using the Lombardi formula. Better accuracy at higher rep ranges than Epley or Brzycki. Enter weight and reps for your estimate.
One Rep Max Calculator (Multi-Formula)
Compare six common 1RM formulas side by side: Epley, Brzycki, Lombardi, Mayhew, O'Conner, and Wathen. Use the spread and average as a practical estimate range.
Progressive Overload Calculator
Plan your progressive overload with projected weights over weeks. Calculate weekly weight increases for linear, percentage-based, and undulating periodization models.
Relative Strength Calculator
Calculate your strength-to-bodyweight ratio for any exercise. Compare your relative strength benchmarks for squat, bench press, deadlift, overhead press, and more.
Rest Time Estimator Calculator
Calculate optimal rest periods between sets based on training goal, exercise type, and intensity. Get recommendations for strength, hypertrophy, and endurance training.
RPE to Percentage Converter Calculator
Convert RPE (Rate of Perceived Exertion) to percentage of 1RM and vice versa. Full RPE-Reps chart based on Mike Tuchscherer's RIR-based RPE scale.
Sinclair Coefficient Calculator
Calculate your Sinclair Total for Olympic weightlifting. Compare lifters across weight classes using the official IWF Sinclair coefficient formula.
Squat Standards Calculator
Compare your squat to strength standards by bodyweight and sex. Find out if your back squat is beginner, intermediate, advanced, or elite level.
Training Volume Calculator
Calculate your weekly training volume per muscle group with sets, reps, and weight. Compare to volume landmarks: MEV, MAV, and MRV for optimal hypertrophy.
Wilks Score Calculator
Calculate your Wilks score for powerlifting. Compare strength across weight classes using the official Wilks coefficient formula for squat, bench, and deadlift totals.
Cardio & Endurance
51 calculatorsRunning pace, heart rate zones, VO2max, cycling FTP, and calorie burn calculators.
5K/10K Training Pace Calculator
Calculate training paces for 5K and 10K races using VDOT-based methodology. Get easy, tempo, interval, and repetition pace zones from a recent race time.
Average Triathlon Finish Times Calculator
Estimate triathlon finish times based on your swim, bike, and run pace. Compare with average finish times across Sprint, Olympic, 70.3, and Ironman distances.
Bike Cadence and Speed Calculator
Convert between cycling cadence (RPM), speed, and gear ratio. Find the balance of pedaling rate and velocity for any terrain.
Bike Cadence Calculator
Calculate your cycling cadence (RPM) based on speed, gear ratio, and wheel size. Find a pedaling rhythm for efficient riding.
Bike Gear Calculator
Calculate gear ratios, gear inches, development, and speed for any bicycle drivetrain. Compare gears across cassettes and chainrings.
Bike Pace Calculator
Calculate cycling pace, speed, time, and distance for any ride. Convert between km/h, mph, min/km, and min/mi for training planning.
Bike Size Calculator
Find your ideal bike frame size based on height, inseam, and riding style. Get recommendations for road, mountain, and hybrid bikes.
Bike Speed Calculator
Calculate cycling speed from distance and time, or estimate speed based on power, weight, terrain, and wind. Convert between mph and km/h.
Calories Burned by Activity Calculator
Calculate calories burned for 100+ activities using MET values from the Compendium of Physical Activities. Enter your weight, activity, and duration.
Calories Burned by Heart Rate Calculator
Estimate calories burned from heart rate data. Uses validated formulas for men and women based on HR, age, weight, and duration.
Chain Length Calculator
Calculate the correct bicycle chain length for any drivetrain. Determine links needed based on chainring, cassette, and chainstay length.
Cycling Breakaway Calculator
Estimate time gaps, catch points, and breakaway scenarios for cycling races. Analyze peloton vs breakaway dynamics as a planning worksheet.
Cycling Calorie Calculator
Calculate calories burned cycling from power data or MET-based estimates. Supports indoor trainer and outdoor riding with adjustable intensity.
Cycling FTP Calculator
Calculate your Functional Threshold Power (FTP) from a 20-minute test, ramp test, or 8-minute test. Set Coggan power zones for structured cycling training.
Cycling Heart Rate Calculator
Calculate cycling heart rate zones, training intensities, and target HR ranges. Personalized zones based on max HR or lactate threshold.
Cycling Wattage Calculator
Calculate cycling power output (watts) from speed, weight, gradient, and wind. Estimate FTP and watts per kilogram for performance tracking.
Cycling Zones Calculator
Calculate personalized cycling power and heart rate training zones. Set zones from FTP or max HR for structured training programs.
E-Bike Range Calculator
Estimate electric bike range based on battery capacity, motor power, terrain, rider weight, and assist level. Plan rides with confidence.
Earned Run Average (ERA) Calculator
Calculate a pitcher's ERA from innings pitched and earned runs. Includes WHIP, K/9, FIP, and complete pitching statistics analysis.
EPOC Estimator Calculator
Estimate your Excess Post-Exercise Oxygen Consumption (EPOC) or afterburn effect based on workout intensity, duration, and fitness level.
Fat Burning Zone Calculator
Estimate a practical heart-rate range for moderate “fat-burning zone” cardio and compare it with other training intensities.
Half Marathon Pace Calculator
Calculate your ideal half marathon pace per mile and per km from a target finish time. Includes mile-by-mile splits, negative-split strategy, and nutrition timing.
Heart Rate Recovery Calculator
Measure and evaluate your heart rate recovery (HRR) after exercise. Assess cardiovascular fitness and track recovery improvement over time.
Heart Rate Zone Calculator (Karvonen Method)
Calculate your 5 heart rate training zones using the Karvonen formula. Enter your age and resting heart rate for personalized zone targets.
HIIT Calorie Burn Calculator
Calculate calories burned during HIIT (High-Intensity Interval Training) workouts. Factor in work/rest intervals, rounds, and EPOC afterburn effect.
Marathon Pace Calculator
Calculate your ideal marathon pace per mile and per kilometer from a target finish time, with mile-by-mile split tables and negative-split strategies.
Max Heart Rate Calculator
Estimate your maximum heart rate using several common age-prediction equations, including Fox, Tanaka, Gulati, Gellish, Nes, Fairbarn, and Oakland.
MET Value Calculator
Calculate Metabolic Equivalent of Task (MET) values and convert them to calories burned. Compare MET values across activities and intensity levels.
Miles to Steps Converter Calculator
Convert miles or kilometers to steps and vice versa. Estimate step count based on distance, height, and walking or running stride length.
Pace Zone Calculator
Calculate training pace zones from your threshold pace or a recent race result. Get Jack Daniels or Pfitzinger style zones for structured running training.
Race Time Predictor Calculator
Predict your finish times for 5K, 10K, half marathon, marathon, and custom distances using the Riegel and Cameron formulas from a known race result.
Rowing Pace Calculator
Calculate rowing split time, watts, and calories from ergometer data. Convert between pace per 500m, watts, and calorie rate for erg training.
Running Calorie Calculator
Calculate calories burned running based on pace, distance, weight, and terrain. Includes MET values, net vs gross calories, and pacing strategies.
Running Cost Calculator (Cost Per Mile/Km)
Calculate the true cost per mile or kilometer of running. Factor in shoes, gear, race fees, nutrition, and maintenance for complete running expense analysis.
Running Pace Calculator
Convert between running pace (min/mi, min/km) and speed (mph, km/h). Calculate finish times for any distance from your pace or speed.
Running Split Calculator
Plan your race splits mile-by-mile or km-by-km. Choose even, negative, or positive split strategies for 5K, 10K, half marathon, or marathon.
Running Splits Calculator
Generate even, negative, or positive split tables for any race distance. Plan mile and kilometer splits with pacing strategies for 5K to marathon.
Step Calorie Calculator
Calculate how many calories you burn from walking or running steps. Estimate calorie expenditure based on step count, body weight, pace, and stride length.
Swimming Calorie Calculator
Calculate calories burned swimming by stroke, intensity, and duration. Compare energy burn across strokes with MET-based estimates and distance tracking.
Swimming Time Calculator
Calculate swimming time for any distance based on pace. Estimate split times, convert between swimming units, and compare paces across strokes and distances.
Tabata Interval Calculator
Calculate the calorie burn and training load of Tabata-style workouts. Classic 20s work / 10s rest protocol with customizable exercises and rounds.
Target Heart Rate Calculator
Calculate a target heart rate range for different exercise intensities using both %HRmax and Karvonen methods.
Training Load (TRIMP) Calculator
Calculate your TRIMP training load using Banister's model. Track session intensity with heart rate data and monitor acute vs chronic training load ratio.
Triathlon Calculator
Plan your triathlon race with split time predictions, pacing strategy, nutrition planning, and transition optimization across Sprint, Olympic, 70.3, and Ironman distances.
Triathlon Training Plan Calculator
Generate a personalized triathlon training plan with weekly volume, discipline breakdown, and periodization. Build plans for Sprint through Ironman with progressive overload.
VO2 Max Calculator
Estimate your VO2 max from common field tests: Cooper Test, 1.5 Mile Run, Rockport Walk Test, and step tests. Assess aerobic fitness level.
VO2 Max Calculator for Runners
Estimate VO2 max from your race results. Use 5K, 10K, half marathon, or marathon times to calculate aerobic capacity and predict race performances.
VO2max Calculator (Cooper 12-Minute Run Test)
Estimate your VO2max from the Cooper 12-minute run test. Enter the distance you covered to get your aerobic fitness rating and age-based percentile.
VO2max Calculator (Rockport Walk Test)
Estimate your VO2max with the Rockport 1-mile walk test. Accessible for all fitness levels. Enter your walk time, heart rate, weight, age, and sex.
Walking Calorie Calculator
Calculate calories burned walking based on pace, distance, weight, and incline. Includes step count estimates and walking vs running comparisons.
Watts per Kilogram Calculator
Calculate your cycling power-to-weight ratio (W/kg) from FTP and body weight. Compare to amateur and pro benchmarks by category.
Exercise Science
4 calculatorsPlyometric power, swimming efficiency, and exercise equivalence calculators.
Dog Walking Benefits Calculator
Calculate calories burned, steps taken, distance, and cardio minutes from dog walking. Includes benefits for you and your dog by pace and terrain.
Plyometric Power Calculator
Estimate peak and average power from your vertical jump using the Lewis and Sayers formulas. Compare power output across body weights.
Smoking Recovery Timeline Calculator
Track your body's recovery after quitting smoking. See cigarettes avoided, money saved, life regained, and health milestones from 20 minutes to 15 years.
Swimming SWOLF Calculator
Calculate your SWOLF score (swimming efficiency metric) from lap time and stroke count. Track efficiency by stroke type and pool length.
Flexibility
2 calculatorsSit-and-reach, ROM assessment, and flexibility scoring calculators.
Flexibility Score Calculator
Calculate a composite flexibility score from sit-and-reach, shoulder, hip, and ankle mobility tests. Get percentile-based ratings by age and gender.
Sit-and-Reach Calculator
Compare your sit-and-reach test distance to normative tables by age and gender. Get your percentile ranking and flexibility classification.
Vitals & Lab Values
8 calculatorsBlood pressure, blood sugar, cholesterol, and spirometry calculators.
Blood Pressure Category Calculator
Classify your blood pressure reading using AHA guidelines. See color-coded risk levels from Normal to Hypertensive Crisis with lifestyle recommendations.
Blood Sugar Converter
Convert blood sugar levels between mg/dL and mmol/L. View normal, prediabetic, and diabetic ranges with color-coded classifications.
Cholesterol Ratio Calculator
Calculate total cholesterol to HDL ratio and non-HDL cholesterol, then review those results as adjunct lipid markers alongside the rest of the panel.
HbA1c to Average Glucose Calculator
Convert HbA1c percentage to estimated average glucose (eAG) in mg/dL and mmol/L using the ADAG study formula. Classify your A1c level.
LDL/HDL Ratio Calculator
Calculate your LDL to HDL cholesterol ratio and review it as a descriptive lipid-balance marker alongside the rest of the lipid panel.
Peak Flow Percentage Calculator
Calculate peak expiratory flow (PEF) as a percentage of predicted or personal-best values and place the result into the usual Green/Yellow/Red monitoring zones.
Spirometry Predicted Value Calculator
Calculate predicted FEV1, FVC, and FEV1/FVC values from reference equations and compare measured results against those predicted values.
Triglyceride/HDL Ratio Calculator
Calculate the triglyceride-to-HDL cholesterol ratio and use it as a rough lipid-pattern marker alongside the rest of the lipid panel.
Sleep
3 calculatorsSleep cycle, sleep debt, and sleep efficiency calculators.
Sleep Cycle Calculator
Calculate optimal wake times based on 90-minute sleep cycles. Wake up feeling refreshed by aligning your alarm with the end of a complete sleep cycle.
Sleep Debt Calculator
Calculate your accumulated sleep debt over the past week. Track how much sleep you owe your body and estimate recovery time to return to baseline.
Sleep Efficiency Calculator
Calculate your sleep efficiency percentage by comparing actual time asleep to total time in bed. A sleep efficiency above 85% is considered good sleep quality.
Hydration
3 calculatorsDaily water needs, sweat rate, and electrolyte replacement calculators.
Daily Hydration Calculator
Estimate daily fluid intake from body weight, activity, and climate. Provides a practical hydration schedule for planning purposes.
Electrolyte Replacement Calculator
Estimate sodium, potassium, and magnesium losses from sweat during exercise. Get personalized electrolyte replacement recommendations based on your sweat rate.
Sweat Rate Calculator
Calculate your sweat rate during exercise using pre and post-workout weigh-ins. Determine fluid replacement needs to optimize performance and prevent dehydration.
General Health
201 calculatorsKidney function, medication dosing, UV exposure, and health screening calculators.
20/20 Vision Calculator
Convert Snellen visual acuity to LogMAR, decimal, and MAR. Check driving eligibility and compare vision classification across international standards.
6-Minute Walk Test Calculator
Calculate 6MWT predicted distance using Enright equations. Evaluate percent predicted, NYHA class, oxygen desaturation, chronotropic index, and DSP.
A-a Gradient Calculator
Calculate the alveolar-arterial oxygen gradient from ABG values. Includes P/F ratio, expected gradient by age, altitude adjustment, and differential diagnosis table.
Absolute Eosinophil Count (AEC) Calculator
Calculate absolute eosinophil count from WBC and differential. Classify eosinophilia severity, review differentials, and get workup guidance by clinical context.
ACFT Score Calculator
Legacy Army Combat Fitness Test (ACFT) score calculator for archived six-event scores and historical reference use.
Acid-Base Disorder Calculator
Interpret ABG results with step-by-step acid-base analysis. Calculates anion gap, delta-delta ratio, Winter's formula, and identifies primary and mixed disorders.
ACR TI-RADS Calculator — Thyroid Nodule Risk Stratification
Score thyroid nodules using ACR TI-RADS, with point breakdown, TI-RADS level, and FNA/follow-up reference thresholds rather than a stand-alone biopsy decision.
Addiction Screening Calculator
CAGE and DAST-10 substance use screening questionnaires. Scores, interprets severity, and provides recommended actions for alcohol and drug use assessment.
Adrenal CT Washout Calculator
Calculate absolute and relative percentage washout for adrenal masses. Differentiates adenoma from metastasis/carcinoma with contrast enhancement curves.
AHI (Apnea-Hypopnea Index) Calculator
Calculate your Apnea-Hypopnea Index from sleep study data. Includes supine AHI, REM AHI, positional analysis, and severity grading.
Air Force PT Test Score Calculator
Legacy/pre-transition USAF Physical Fitness Assessment score calculator for the older composite PT model before the 2026 PFRA rollout.
Albumin-to-Creatinine Ratio Calculator
Calculate urine albumin-to-creatinine ratio (ACR) with KDIGO staging. Classifies microalbuminuria, macroalbuminuria, and CKD prognosis by GFR and albuminuria.
Alcohol BAC Estimator Calculator
Estimate your Blood Alcohol Concentration (BAC) using the Widmark formula. See how long until your BAC returns to zero and understand impairment levels.
Alcohol Units Calculator
Convert drinks to UK units, US standard drinks, and Australian standard drinks. Calculates alcohol grams, calories, estimated BAC, and weekly risk assessment.
Alteplase Dose Reference Calculator — Stroke & PE
Calculate alteplase dose math for acute ischemic stroke and massive PE, including the weight-based stroke total and fixed PE reference dose.
Alzheimer's Stage And Care Context Worksheet
Review broad Alzheimer's stage and support context from MMSE, diagnosis stage, comorbidities, mobility, and nutrition in a conservative educational worksheet.
ANC (Absolute Neutrophil Count) Calculator
Calculate your absolute neutrophil count from CBC with differential. Includes ALC, AMC, AEC, severity grading, febrile neutropenia risk, and causes of neutropenia.
ANC Calculator (Without Bands)
Calculate absolute neutrophil count when bands are not reported. Includes NLR (neutrophil-to-lymphocyte ratio), all absolute counts, severity grading, and percentage or absolute input modes.
Anion Gap Calculator
Calculate serum anion gap and albumin-corrected anion gap. Differentiate metabolic acidosis causes with clinical interpretation.
Ankle Fracture Treatment Calculator
Ottawa ankle rules, Weber classification, and stability assessment for ankle fractures. Evaluates medial clear space, syndesmosis, talar tilt, and treatment decisions.
Ankle-Brachial Index Calculator
Calculate the ankle-brachial index (ABI) for PAD screening. Interprets severity, flags non-compressible arteries, inter-arm differences, and Rutherford classification.
APFT (Army Physical Fitness Test) Score Calculator
Calculate your APFT score with push-ups, sit-ups, and 2-mile run. Age and gender-adjusted scoring with minimum standards, promotion points, and fitness category.
APRI Score Calculator (AST to Platelet Ratio Index)
Calculate the APRI score for non-invasive liver fibrosis assessment. Also compares FIB-4 and AST:ALT ratio for broader liver-fibrosis review.
Archery Draw Length Calculator
Calculate your archery draw length from wingspan, height, or forearm measurements. Get arrow length, spine recommendations, and bow size guidance.
Arterial (Vascular) Age Calculator
Estimate your arterial age based on cardiovascular risk factors. Compare vascular age to chronological age with modifiable risk reduction recommendations.
AST:ALT Ratio (De Ritis Ratio) Calculator
Calculate the AST to ALT ratio (De Ritis ratio) and R factor to review common liver-injury patterns alongside the rest of the liver panel.
AUDIT-10 (Full AUDIT) Alcohol Assessment Calculator
Complete AUDIT-10 alcohol use disorder screening tool. All 10 WHO questions with zone scoring, 3-domain breakdown, AUD severity estimation, and evidence-based intervention guide.
AUDIT-C Alcohol Screening Calculator
Calculate your AUDIT-C score for alcohol use screening. 3-question validated tool with sex-specific thresholds, sensitivity data, and clinical intervention recommendations.
Baby Eye Color Predictor Calculator
Predict your baby's eye color probability from parent and grandparent eye colors. Simplified Mendelian genetics model with probability bars, color charts, and eye color facts.
Baby's Milk Intake Calculator
Calculate recommended daily and per-feed milk intake for babies 0-12 months by weight and age. Covers formula and breast milk with growth spurt timing and feeding guidelines.
BAC (Blood Alcohol Content) Calculator
Estimate your blood alcohol content using the Widmark formula. Factors in sex, weight, drinks, time, and stomach contents with impairment levels and legal limits worldwide.
Back to Normal Life (Surgery Recovery) Calculator
Estimate your personalized surgery recovery timeline adjusted for age, fitness, BMI, smoking, diabetes, and complications. Activity milestones for desk work, driving, exercise, and full recovery.
BAI (Body Adiposity Index) Calculator
Calculate your Body Adiposity Index from hip circumference and height. Estimates body fat percentage without a scale, with sex-specific categories and comparison to BMI.
BASDAI (Bath Ankylosing Spondylitis Disease Activity Index) Calculator
Calculate the BASDAI score for ankylosing spondylitis / axial spondyloarthritis. Six questions covering fatigue, pain, stiffness, and enthesitis with guideline-based interpretations.
BBT (Basal Body Temperature) Calculator
Track your basal body temperature for fertility awareness. Estimates ovulation day, cycle phase, fertility window, thermal shift detection with the 3-over-6 rule, and cycle timeline visualization.
Bed Size Calculator
Find the right bed size for your room, height, and number of sleepers. Calculates per-person width, height clearance, room coverage, walking space, and sheet sizes.
BEE / BMR (Basal Energy Expenditure) Calculator
Calculate your Basal Metabolic Rate using Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle formulas. Estimates TDEE, macro targets, and weight management calorie levels.
Benzodiazepine Conversion & Equivalence Calculator
Convert between benzodiazepine doses using diazepam equivalents. Includes a 12-drug equivalence table, half-life context, and general taper-reference notes.
Berg Balance Scale (BBS) Calculator
Score the 14-item Berg Balance Scale for fall risk assessment in older adults. Visual breakdown per task, fall risk thresholds, and minimal clinically important difference guidance.
BIMS (Brief Interview for Mental Status) Calculator
Score the BIMS cognitive screening from the MDS 3.0. Tests repetition, temporal orientation, and recall with interpretation thresholds for intact, moderate, and severe impairment.
Bladder Volume Calculator
Estimate urinary bladder volume from ultrasound dimensions using the ellipsoid formula. Includes post-void residual interpretation, age-based capacity norms, and measurement method comparison.
BMI Amputee Calculator
Calculate adjusted BMI for amputees using body-weight correction factors. Accurate BMI estimation accounting for limb loss with standard amputation percentages.
Body Roundness Index (BRI) Calculator
Calculate the Body Roundness Index from waist circumference and height. Compares BRI to BMI, WHtR, and ABSI with cardiometabolic risk categories and waist circumference thresholds.
Breast Cancer Recurrence Risk Worksheet
Review broad breast-cancer recurrence-context bands from tumor size, grade, nodal status, and receptor pattern in a simplified educational worksheet.
Breast Cancer Risk Calculator (Gail Model)
Estimate 5-year and lifetime breast cancer risk using Gail Model factors: age, menarche, first birth, family history, biopsies, and atypical hyperplasia. Includes chemoprevention and screening guid...
Breast Pump Flange Size Calculator
Find your correct breast pump flange size based on nipple diameter and elasticity. Includes brand availability, fit assessment, size reference table, and signs of poor fit.
Caffeine Calculator
Calculate total caffeine intake from multiple sources, track metabolic decay with half-life modeling, check daily limits, and estimate time until sleep-safe levels. 20+ drink database included.
Caffeine Half-Life Calculator
Calculate how much caffeine remains in your body over time. See hourly caffeine decay, find your ideal cutoff time before bed, and understand caffeine metabolism.
CAGE Questionnaire Calculator
Score the 4-question CAGE alcohol screening questionnaire. Includes interpretation thresholds, SBIRT workflow, and comparison to AUDIT, AUDIT-C, MAST, and other screening tools.
Car Heat Calculator
Estimate interior car temperature based on outside temperature, sun exposure, window status, and vehicle color. Includes temperature timeline, heatstroke warning signs, and safety guidance.
Cardiovascular Disease 10-Year Risk Calculator
Estimate your 10-year cardiovascular risk with a Pooled Cohort Equations-style worksheet and use the result as a primary-prevention discussion aid.
Cerebral Perfusion Pressure (CPP) Calculator
Calculate CPP from MAP and ICP with ICP scenario modeling, pediatric targets, and cerebral autoregulation reference context.
Charlson Comorbidity Index (CCI) Calculator
Calculate the Charlson Comorbidity Index with age adjustment from 19 comorbid conditions. Includes survival estimates, condition weights, and organ system breakdown.
Cigarette Cost & Health Impact Calculator
Estimate the financial cost and public-health impact of smoking. Includes pack-years, savings projections, and a quit-smoking recovery timeline.
Circadian Rhythm Sleep Phase Calculator
Estimate a circadian-style sleep schedule from wake time, sleep goal, and chronotype. Includes bedtime, caffeine cutoff, and daily timing reference windows.
CIWA-Ar Alcohol Withdrawal Assessment Calculator
Calculate the CIWA-Ar score (Clinical Institute Withdrawal Assessment for Alcohol) to assess alcohol-withdrawal severity and place the result in pathway context.
Colorectal Cancer Screening Risk Calculator
Review colorectal cancer screening context from age, family history, and common risk factors. Compares your profile with common screening pathways and discussion points.
Corrected Calcium Calculator
Calculate albumin-corrected calcium from measured serum calcium and albumin levels. Detect true hypocalcemia or hypercalcemia in hypoalbuminemic patients.
Corrected Magnesium Calculator
Calculate an albumin-adjusted magnesium estimate and review broad magnesium context with a cautious educational worksheet.
Corticosteroid Conversion Calculator — Steroid Equivalency
Convert between corticosteroids using equipotent anti-inflammatory dose equivalency. Compares 8 steroids with relative potency, mineralocorticoid activity, half-life, and exposure context.
COVID-19 Event Risk Worksheet
Estimate the chance that at least one attendee is infectious and compare broad mitigation scenarios with a simplified COVID event-risk worksheet.
COVID-19 Severity Context Calculator
Review age- and comorbidity-based COVID severity context with a simplified educational model for infection fatality, hospitalization, ICU, and long-COVID bands.
Creatinine Clearance Calculator
Calculate creatinine clearance using the Cockcroft-Gault equation. Estimate kidney function for drug dosing and renal assessment.
Creatinine Clearance Calculator (Cockcroft-Gault)
Calculate creatinine clearance using the Cockcroft-Gault equation with actual, ideal, and adjusted body weight. Review the result in renal-function and medication-dosing context.
Crohn's Disease Activity Index (CDAI) Calculator
Calculate the CDAI score from 8 weighted clinical variables. Includes component breakdown, activity classification, and common clinical-trial thresholds.
Crown-Rump Length Gestational Age Calculator
Calculate gestational age and estimated due date from crown-rump length (CRL) ultrasound measurement using Robinson or Hadlock formulas.
CURB-65 Pneumonia Severity Score Calculator
Calculate the CURB-65 score for community-acquired pneumonia severity assessment and see 30-day mortality plus published care-setting context.
Denver HIV Risk Score Calculator
Estimate how behavioral and demographic factors fit into the Denver HIV Risk Score and use the result as an HIV screening and prevention discussion aid.
DIC (Disseminated Intravascular Coagulation) Scoring Calculator
Calculate the ISTH DIC score for diagnosing disseminated intravascular coagulation. Assess overt vs. non-overt DIC with treatment phenotype guidance.
Dietary Reference Intake (DRI) Calculator
Calculate your daily Dietary Reference Intakes (DRI) for vitamins, minerals, and macronutrients. Personalized RDA values based on age, sex, and activity.
DLBCL IPI Prognosis Calculator
Review the International Prognostic Index (IPI) and related prognostic context for diffuse large B-cell lymphoma.
Dual Antiplatelet Therapy Duration Calculator
Review DAPT-duration context after coronary stenting using published bleeding and ischemic risk factors. DAPT score with stent type and OAC considerations.
DUDIT (Drug Use Disorders Identification Test) Calculator
Complete the DUDIT screening questionnaire to identify hazardous drug use, harmful use, and potential drug dependence. 11-item validated assessment.
Due Date Calculator
Calculate your estimated due date (EDD) using Naegele's rule from your last menstrual period, conception date, or IVF transfer date. View trimester timeline and key milestones.
Duke Activity Status Index Functional Capacity Calculator
Calculate the Duke Activity Status Index (DASI) to estimate functional capacity in METs and VO2 peak. Assess perioperative cardiac risk for surgery.
Edinburgh Postnatal Depression Scale (EPDS) Calculator
Screen for perinatal depression with the EPDS questionnaire. 10-item validated scale for postpartum, antenatal, and paternal depression screening.
Effective Regurgitant Orifice Area (EROA) Calculator
Calculate EROA via PISA or volumetric method for mitral and aortic regurgitation severity grading. Includes regurgitant volume, fraction, and ASE severity tables.
eGFR Calculator
Calculate estimated glomerular filtration rate using the CKD-EPI race-free creatinine equation. Review chronic kidney disease stage bands and kidney-function context.
Egg Freezing Planning Worksheet
Explore a simplified egg-freezing planning worksheet by age, egg count, and cycle count.
Endotracheal Tube (ETT) Size Calculator
Estimate endotracheal tube size for pediatric and adult patients using age-based formulas, size tables, insertion depth, suction catheter, and blade references.
EORTC Bladder Cancer Recurrence & Progression Score Calculator
Calculate EORTC risk scores for non-muscle-invasive bladder cancer recurrence and progression. Includes risk group classifications and probability tables.
Estimated Due Date (EDD) Calculator
Calculate your estimated due date using LMP, ultrasound dating, or known conception date. Includes pregnancy timeline, gestational age, and term classifications.
Estimated Energy Requirement (EER) Calculator
Calculate your daily Estimated Energy Requirement using the IOM equation. Compare BMR methods, get AMDR macronutrient ranges, and plan for weight goals.
Exclusive Pumping Schedule & Volume Calculator
Calculate daily breast milk needs, pumping schedules, and supply tracking for exclusively pumping mothers. Includes storage guidelines and age-based schedules.
Face Shape Calculator
Determine your face shape from measurements. Get personalized eyewear, hairstyle, and makeup recommendations for oval, round, square, heart, diamond, oblong, and triangle face shapes.
Fagerström Test for Nicotine Dependence (FTND) Calculator
Assess nicotine dependence severity with the 6-item Fagerström Test. Get FTND score, dependence level, pharmacotherapy recommendations, and cessation treatment guidance.
Fertility by Age Calculator
Estimate natural and IVF pregnancy rates by age. Includes cumulative probability, miscarriage and aneuploidy risk, AMH interpretation, and time-to-conceive milestones.
FIB-4 Index Calculator — Hepatic Fibrosis
Calculate the FIB-4 index for liver fibrosis risk screening using age, AST, ALT, and platelets, with age-adjusted cutoffs and APRI comparison.
Finnegan Neonatal Abstinence Score Worksheet
Calculate the Finnegan NAS to review neonatal opioid withdrawal severity, repeated-score thresholds, and category breakdowns in worksheet form.
Fish Oil / Omega-3 Dosage Calculator
Calculate daily EPA and DHA omega-3 requirements by health condition. Includes dietary fish intake, supplement dosing, cost estimates, and fish omega-3 content reference table.
Fractional Excretion of Sodium (FENa) Calculator
Calculate FENa to differentiate prerenal from intrinsic renal AKI. Includes FENa formula, AKI diagnostic indices comparison, and clinical interpretation with diuretic use guidance.
Fractional Excretion of Urea (FEUrea) Calculator
Calculate FEUrea to differentiate prerenal from intrinsic AKI in patients on diuretics. Includes FEUrea vs FENa comparison, AKI diagnostic indices, and clinical interpretation.
Free Testosterone Calculator (Vermeulen Method)
Calculate free and bioavailable testosterone using total testosterone, SHBG, and albumin. Includes age-adjusted references, SHBG interpretation, testosterone fractions visualization.
Free Water Deficit Calculator — Hypernatremia Correction
Estimate free water deficit for hypernatremia review with a TBW-based formula and Adrogue-Madias-style worksheet context for fluid planning.
GAD-7 Anxiety Screening Calculator
Score the GAD-7 generalized anxiety disorder questionnaire. Includes severity interpretation, item-level analysis, and symptom-domain context.
Glasgow Coma Scale (GCS) Calculator
Calculate the Glasgow Coma Scale score from eye, verbal, and motor responses. Includes GCS-Pupils score, severity classification, airway decision support, mortality estimates, and motor score analy...
Glomerular Filtration Rate (GFR) Calculator
Estimate kidney filtration with CKD-EPI, MDRD, Cockcroft-Gault, and cystatin C equations. Includes CKD stage context, albuminuria, and equation comparison for medication review or referral discussions.
Glucose Infusion Rate (GIR) Calculator
Calculate glucose infusion rate from dextrose concentration, IV rate, and weight. Includes neonatal/pediatric/adult targets, reverse calculation, dextrose concentration table, and hypoglycemia prot...
Glycemic Index & Glycemic Load Calculator
Calculate glycemic index and glycemic load for foods and meals. Includes 29-food reference database, meal GI calculator, GL classification, and blood sugar impact estimates.
Gorlin Formula Valve Area Calculator
Calculate cardiac valve area using the Gorlin formula from catheterization data including cardiac output, heart rate, and pressure gradient.
Gout Diagnosis Scoring Calculator
Score gout probability using a structured ACR/EULAR gout-classification worksheet with serum urate, joint involvement, and imaging findings.
GRACE ACS Risk Score Calculator
Calculate the GRACE score for acute coronary syndrome risk stratification including in-hospital and 6-month mortality prediction.
Growth Chart Percentile Calculator
Calculate height-for-age and weight-for-age percentiles for children 2-20 using CDC growth reference data. Track growth patterns and identify potential concerns.
Hand Sanitizer Effectiveness Calculator
Estimate hand sanitizer efficacy based on type, alcohol concentration, application time, volume, and hand condition with pathogen comparison.
hCG Levels and Doubling Time Tracker
Track serial hCG levels, calculate doubling time, and compare the most recent value with gestational-age reference ranges for early-pregnancy trend context.
Hearing Loss Frequency Calculator
Calculate Pure Tone Average (PTA) from audiogram frequencies and classify hearing loss severity using WHO criteria. Enter dB HL values for each frequency.
Heat Index Health Risk Calculator
Calculate the heat index (feels-like temperature) from air temperature and humidity. Get NWS health risk classification and outdoor activity safety guidelines.
Hematocrit to Hemoglobin Ratio Converter
Convert between hematocrit and hemoglobin values with reference-range context, screening-level anemia bands, and a simple altitude adjustment note.
Hepatic Steatosis Index Calculator
Calculate the Hepatic Steatosis Index (HSI) to screen for non-alcoholic fatty liver disease using ALT, AST, BMI, diabetes status, and sex.
HOMA-IR Insulin Resistance Calculator
Calculate HOMA-IR, HOMA-B beta cell function, and QUICKI index from fasting insulin and glucose to assess insulin resistance severity.
ICH Score Prognosis Worksheet
Calculate the Intracerebral Hemorrhage (ICH) score and review the historical 30-day and 12-month mortality context alongside the score breakdown.
ICH Volume Calculator (ABC/2 Method)
Estimate intracerebral hemorrhage volume using the ABC/2 method from CT imaging and place the result in common ICH scoring and literature reference ranges.
Implantation Calculator
Estimate your likely implantation window and testing timeline based on ovulation, LMP, or IVF transfer date, using a DPO 6-12 reference chart.
Incidence Rate Calculator
Calculate disease incidence rates per 1,000 or 100,000 person-time with confidence intervals. Compare periods and convert between epidemiologic measures.
Injury Severity Score (ISS) Calculator
Calculate the Injury Severity Score from AIS ratings across 6 body regions. Includes NISS plus simplified RTS/TRISS context and mortality ranges.
Isotretinoin (Accutane) Dose Calculator
Calculate isotretinoin cumulative dose, track treatment progress, and review lab values. Includes dosing by severity, iPLEDGE reminders, and lab schedules.
IV Drip Rate Calculator
Calculate IV drip rate in drops per minute (gtts/min) and mL per hour from volume, time, and drop factor as a reference worksheet.
IV Drops per Minute (Drip Rate) Calculator
Calculate IV drip rate in drops per minute from volume, time, and tubing drop factor as a reference worksheet.
Karvonen Formula Calculator
Calculate target heart rate zones using the Karvonen (Heart Rate Reserve) method. Compare 5 training zones with resting HR-adjusted targets for personalized exercise.
Kidney Failure Risk Equation (KFRE) Calculator
Estimate 2-year and 5-year risk of treated kidney failure with a 4-variable KFRE worksheet. Includes CKD stage, albuminuria category, and the KDIGO heatmap for review context.
Kidney Stone Calculator
Estimate spontaneous passage rates by stone size and location, treatment options, prevention strategies, and 24-hour urine interpretation for kidney stones.
Kidney Transplant Graft-Survival Worksheet
Review kidney transplant graft-survival context from donor age, HLA mismatch, cold ischemia time, PRA, donor type, and retransplant status in a simplified educational worksheet.
Kt/V Calculator (Dialysis Adequacy)
Calculate Kt/V dialysis adequacy using the Daugirdas II formula. Includes spKt/V, eKt/V, URR, stdKt/V, Watson body water, and adequacy troubleshooting.
Local Anesthetic Dosing Calculator
Estimate local anesthetic maximum dose and volume by agent, concentration, weight, and epinephrine use.
Luteal Phase Calculator
Calculate luteal phase length from cycle data, estimate implantation timing windows, and review progesterone values in general cycle-tracking context.
Lymphocyte Count & WBC Differential Calculator
Calculate absolute lymphocyte count (ALC), ANC, NLR, and the full WBC differential from CBC results as a structured interpretation worksheet.
Maddrey Discriminant Function Calculator
Calculate the Maddrey Discriminant Function (MDF) for alcoholic-hepatitis severity context and compare it with related liver-severity markers such as MELD.
Mask vs. No Mask Calculator
Compare respiratory infection transmission models with and without masking. Explore different mask types, compliance levels, and population-level impact.
MCA-PSV Doppler Calculator (Fetal Anemia)
Convert MCA peak systolic velocity to multiples of median (MoM) using Mari reference values and review the result in fetal-anemia screening context.
Mcg to IU Converter (Vitamins)
Convert between micrograms (mcg) and International Units (IU) for Vitamin D, A, and E with RDA comparison and safety assessment.
Mean Airway Pressure & Oxygenation Index Calculator
Calculate mean airway pressure (MAP), oxygenation index (OI), P/F ratio, and driving pressure for conventional and HFOV ventilation with severity grading.
Mean Sac Diameter Calculator (Early Pregnancy)
Calculate mean gestational sac diameter, estimate gestational age, and review early-pregnancy ultrasound findings against conservative SOM and ACOG reference thresholds.
Medical Radiation Dose Calculator
Calculate radiation dose from X-rays, CT scans, and nuclear medicine in mSv with background equivalents, cancer risk estimates, and fetal dose assessment.
Medical Unit Converter Calculator
Convert common lab values between conventional (US) and SI (international) units. Covers glucose, cholesterol, hemoglobin, creatinine, and 20+ lab tests.
Medication Dose by Weight Calculator
Calculate weight-based medication doses for common OTC medications. Get dose per kg calculations for acetaminophen, ibuprofen, and other non-prescription drugs.
Menstrual Cycle Tracker Calculator
Track your menstrual cycle phases — follicular, ovulatory, and luteal. Predict next period date, PMS window, and cycle regularity from your average cycle length.
Metastatic Prostate Cancer Prognosis Worksheet
Review broad metastatic prostate-cancer prognostic context from disease setting, metastatic burden, PSA, grade group, performance status, and key labs in a simplified educational worksheet.
MIPI Score Calculator — Mantle Cell Lymphoma
Calculate the Mantle Cell Lymphoma International Prognostic Index (MIPI and MIPI-c) for risk stratification and prognosis context in mantle cell lymphoma.
MME Calculator — Morphine Milligram Equivalents
Calculate total daily morphine milligram equivalents (MME) from multiple opioids with CDC reference bands, equianalgesic conversion context, and naloxone review cues.
mmol/L to mg/dL Converter
Convert lab values between mmol/L and mg/dL for glucose, cholesterol, creatinine, calcium, and 14 common analytes with reference ranges and batch mode.
Mortality Rate Calculator
Calculate crude, cause-specific, case fatality, infant, neonatal, maternal mortality rates, PMR, and YPLL with interpretation and global benchmarks.
Navy PRT Calculator
Calculate Navy Physical Readiness Test scores for push-ups, plank, 1.5-mile run, and body composition assessment with age/sex-specific standards.
NEDOCS Calculator
Calculate the National Emergency Department Overcrowding Score to objectively assess ED crowding level and benchmark operational strain.
Neutrophil-to-Lymphocyte Ratio (NLR) Calculator
Calculate NLR from CBC results with context-specific reference thresholds across general, infectious, cardiovascular, and oncology settings. Includes PLR, LMR, and SII.
NIH Stroke Scale (NIHSS) Calculator
Calculate the NIH Stroke Scale score to quantify stroke severity, summarize the exam, and place the result in stroke-pathway context with all 15 examination items.
Noise Pollution & Hearing Risk Calculator
Calculate noise exposure dose, safe duration limits, and hearing damage risk with OSHA/NIOSH standards, dB combination, distance correction, and protection effectiveness.
Nuchal Translucency (NT) Screening Calculator
Estimate first-trimester trisomy screening context from NT measurement and maternal age, with optional nasal-bone context. This page is educational and does not reproduce a full combined-screening report.
Number Needed to Treat (NNT) Calculator
Calculate NNT, NNH, ARR, RRR, relative risk, and odds ratio from clinical trial data with confidence intervals and cost-effectiveness analysis.
Opioid Withdrawal (COWS) Worksheet
Score opioid withdrawal severity using the Clinical Opiate Withdrawal Scale (COWS) with timing context for withdrawal review and MOUD discussions.
Osmolality Gap Calculator
Calculate serum osmolality and the osmolal gap from common chemistry inputs. Use it as an interpretation aid when reviewing unmeasured osmoles alongside the broader clinical picture.
Ovulation Calculator
Calculate your ovulation day and fertile window based on your last menstrual period and cycle length. Identify up to 6 fertile days each month for conception planning.
Pack-Years Calculator
Calculate pack-year smoking history and place it in smoking-exposure, screening, and risk-context reference ranges.
Parkland Formula (Burn Resuscitation) Calculator
Calculate an initial burn-fluid worksheet using the Parkland formula with Rule of Nines TBSA estimation, delayed presentation adjustment, and pediatric context.
PECARN Pediatric Head Injury Calculator
Use the PECARN pediatric head-injury rule as an educational worksheet for minor blunt head trauma and to frame observation-versus-imaging reference context.
Pediatric BMI Percentile Calculator
Calculate BMI-for-age percentile for children ages 2-20. Classify weight status using CDC growth chart categories: underweight, normal, overweight, and obese.
Period & Menstrual Cycle Calculator
Track your menstrual cycle, predict next period and ovulation dates, identify fertile windows, and understand cycle phases with this free period calculator.
PHQ-9 Depression Screening Questionnaire Calculator
Screen for depression using the PHQ-9 questionnaire. Score severity, get treatment recommendations, and track symptoms over time with this validated tool.
PISA Calculator — Proximal Isovelocity Surface Area
Use the 2D PISA method to estimate EROA and regurgitant volume for valvular regurgitation in a structured echocardiography worksheet.
Plasma Volume Calculator
Estimate total blood volume, plasma volume, and red cell volume using Nadler, Lemmens, or Gilcher methods. Calculate allowable blood loss for surgical planning.
Pneumonia Severity Index (PSI/PORT) Calculator
Calculate the PSI/PORT score to assess pneumonia severity and 30-day mortality risk class. Useful for site-of-care review in community-acquired pneumonia.
Pokémon GO Walking Exercise & Calories Calculator
Calculate calories burned, steps taken, egg hatching time, and weekly Adventure Sync goals for Pokémon GO walking sessions.
Post-Void Residual Volume (PVR) Calculator
Calculate and interpret post-void residual urine volume, voiding efficiency, and flow rate as a lower-urinary-tract worksheet rather than a stand-alone treatment rule.
Pregnancy Weight Gain Calculator
Review pregnancy weight-gain reference ranges based on IOM 2009 guidance and pre-pregnancy BMI. Includes trimester context for singleton and twin pregnancies.
Prescription Refill Date Calculator
Calculate when to refill your prescription based on pill count, dosing frequency, and lead time. Plan ahead to never run out of medication.
Progesterone to Estradiol (Pg:E2) Ratio Calculator
Calculate the progesterone-to-estradiol ratio, convert common lab units, and review the result in cycle-phase or hormone-monitoring context.
Qp/Qs Ratio Calculator — Pulmonary-to-Systemic Flow
Calculate the Qp/Qs ratio from cardiac-catheterization oxygen saturations to review intracardiac shunt magnitude in ASD, VSD, PDA, and related congenital-heart contexts.
QTc Calculator — Corrected QT Interval
Calculate corrected QT interval using Bazett, Fridericia, Framingham, and Hodges formulas. Assess risk for QT prolongation and Torsades de Pointes.
Quarantine Activity & Indoor Exercise Planner
Plan effective indoor workouts during quarantine or home isolation. Calculate calories burned for bodyweight exercises, yoga, HIIT, and more based on your space and fitness level.
QUICKI Insulin Sensitivity Calculator
Calculate QUICKI, HOMA-IR, HOMA-beta, and related fasting metabolic indexes from fasting insulin and glucose as a screening worksheet for insulin-sensitivity context.
Rate Pressure Product (RPP) Calculator
Calculate Rate Pressure Product to estimate myocardial workload, with MAP, pulse pressure, and common symptom-threshold context rather than a stand-alone exercise prescription.
RCRI — Revised Cardiac Risk Index Calculator
Calculate RCRI (Lee Index) for perioperative cardiac risk stratification. Estimates major adverse cardiac event probability before non-cardiac surgery using 6 clinical predictors.
REM Sleep & Sleep Cycle Calculator
Estimate your REM sleep, deep sleep, and sleep cycle distribution based on total sleep time, age, and sleep quality factors. Includes cycle-by-cycle breakdown and optimization tips.
RMR — Resting Metabolic Rate Calculator
Calculate your resting metabolic rate using Mifflin-St Jeor, Harris-Benedict, Katch-McArdle, and Cunningham formulas. Get TDEE, calorie targets, and macronutrient estimates.
RSBI — Rapid Shallow Breathing Index Calculator
Calculate the Rapid Shallow Breathing Index (f/VT) as a spontaneous-breathing worksheet, with P/F ratio and checklist context rather than a stand-alone extubation order.
SAAG — Serum-Ascites Albumin Gradient Calculator
Calculate the Serum-Ascites Albumin Gradient to differentiate portal-hypertensive from non-portal ascites. Includes ANC screening context, LDH analysis, and a reference pattern table.
SAPS II — Simplified Acute Physiology Score Calculator
Calculate the SAPS II ICU severity score from 17 variables. Estimates hospital mortality risk for critically ill patients using the worst values in the first 24 hours of ICU admission.
SCORAD — Atopic Dermatitis Severity Calculator
Calculate the Scoring Atopic Dermatitis (SCORAD) index to review eczema extent, intensity, and symptom burden in one severity worksheet.
Semen Analysis Calculator — WHO 6th Edition Reference Values
Interpret semen analysis results against the WHO 6th edition reference limits. Calculates total motile count, functional sperm, and ART suitability assessment.
SIR Model Epidemic Simulator — Viral Infection Spread
Simulate viral epidemic spread using the SIR (Susceptible-Infected-Recovered) compartmental model. Set R₀, vaccination, interventions, and view epidemic curves, peak timing, attack rates, and herd...
Sleep Time Calculator — Bedtime & Wake Cycle Planner
Calculate the ideal bedtime based on your wake-up time, sleep cycles, and age. Aligns with 90-minute cycles and National Sleep Foundation recommendations.
Sobriety & BAC Calculator — Blood Alcohol Estimator
Estimate your current blood alcohol concentration (BAC), time to sober, and impairment level using the Widmark formula. Includes hourly BAC timeline and effects reference.
Social Distancing & Exposure Risk Calculator
Estimate respiratory illness transmission risk based on distance, duration, masks, ventilation, vaccination status, and community prevalence. Includes mitigation checklist.
Standard Drink Calculator — Alcohol Content Converter
Convert any alcoholic beverage to standard drinks (US, UK, AU, CA). Calculate pure alcohol grams, calories, metabolism time, and compare 15+ common drink types.
STOP-BANG Score — OSA Screening Calculator
Screen for obstructive sleep apnea risk using the STOP-BANG questionnaire. 8 yes/no questions with risk stratification and predictive performance data.
Subjective Happiness Scale Calculator
Assess subjective happiness using the validated 4-item SHS by Lyubomirsky & Lepper with normative comparisons and well-being factor analysis.
Swiss Cheese Model — Layered Protection Calculator
Visualize layered risk reduction from multiple preventive measures with an illustrative Swiss cheese model worksheet.
Testosterone to Estradiol Ratio (T:E2) Calculator
Calculate the testosterone-to-estradiol ratio with male reference ranges, assay notes, and hormone-balance context rather than medication instructions.
Time of Death Estimator — Postmortem Interval (PMI) Calculator
Estimate time since death with a simplified Henssge-based body-cooling worksheet that also shows broad postmortem-change timelines.
Tinetti Assessment Tool — Balance & Gait Fall Risk Calculator
Score the Tinetti Performance-Oriented Mobility Assessment (POMA) with 10 balance and 10 gait items. Calculates total score, fall risk category, component subscores, and visual progress bars.
TTKG Calculator — Transtubular Potassium Gradient
Calculate the transtubular potassium gradient (TTKG) as a renal-potassium-handling worksheet for hyperkalemia or hypokalemia review, with validity checks and limitation notes.
Twinning Rate Calculator — Twin Pregnancy Probability
Estimate a worksheet-style twinning risk based on maternal age, population context, family history, parity, BMI, prior twins, and IVF/embryo transfer count. Includes DZ/MZ breakdown and ethnic comparison.
Type 2 Diabetes Risk Calculator (FINDRISC)
Use a FINDRISC-style worksheet to organize common type 2 diabetes risk factors, screening context, and modifiable lifestyle factors in one place.
Urine Output Calculator — mL/kg/hr & AKI Staging
Calculate urine output rate (mL/kg/hr), classify oliguria/anuria/polyuria, and assess KDIGO AKI staging by urine output. Supports adults, children, infants, and neonates with hourly tracking.
URR & Kt/V Calculator — Dialysis Adequacy
Calculate urea reduction ratio (URR) and Kt/V (Daugirdas) for hemodialysis adequacy assessment. Includes eKt/V, UF rate monitoring, KDOQI reference bands, and common low-clearance review areas.
UV Exposure Time Calculator
Calculate safe sun exposure time based on UV index, skin type (Fitzpatrick I–VI), and SPF. Get sunscreen reapplication schedules and UV protection guidelines.
Vision Prescription Converter Calculator
Convert between vision prescription formats including diopters, Snellen, and LogMAR. Plus glasses-to-contacts conversion with vertex distance correction.
Vital Capacity & Spirometry Calculator — FVC, FEV₁, GOLD Staging
Calculate predicted FVC, FEV1, and PEF from age, sex, height, and population reference context, then compare measured values in a spirometry-pattern worksheet.
Wake-Up Time & Sleep Cycle Calculator
Find ideal bedtimes or wake-up times aligned to 90-minute sleep cycles. Includes sleep stage visualization, NSF age-specific recommendations, and sleep hygiene tips.
Warsaw Method — Neonatal Fluid Calculator
Compare neonatal fluid-reference ranges using the Warsaw graduated fluid approach. Supports ELBW, VLBW, and term infants with insensible-loss adjustments for worksheet-style comparison.
Wind Chill Health Risk Calculator
Calculate wind chill temperature from air temperature and wind speed. Get NWS frostbite risk times and cold weather safety guidelines for outdoor activity.
Winters' Formula Calculator — ABG Acid-Base Analysis
Calculate expected pCO2 for metabolic acidosis using Winters' formula and review the result beside the anion gap and delta-gap worksheet.
Endurance & Racing
16 calculatorsRunning, cycling, triathlon pacing, race prediction, and endurance nutrition calculators.
Aerodynamic Drag Calculator
Calculate aerodynamic drag force and power required to overcome air resistance. Input CdA, speed, and air density to estimate drag and power savings from position changes.
Age-Graded Running Time Calculator
Calculate your age-graded running performance percentage. Compare times across ages and genders using WMA/USATF age-grading standards.
Boston Marathon Qualifying Pace Calculator
Calculate your Boston Marathon qualifying time and target pace by age and gender. Includes BQ buffer recommendations and mile-by-mile pacing strategy.
Carb Loading Planner Calculator
Plan your carbohydrate loading protocol with daily carb targets based on body weight. Supports classic 3-day and modified 1-day carb loading strategies for endurance events.
Cycling Drafting Benefit Calculator
Estimate power savings from drafting behind another cyclist. Calculate drag reduction by wheel gap, group size, and position in the peloton.
Cycling FTP Test Calculator
Calculate your Functional Threshold Power (FTP) from 20-minute, 8-minute, or ramp test results. Get Coggan power training zones and W/kg classification.
Lactate Threshold Pace Calculator
Calculate your lactate threshold pace and heart rate training zones from recent race times. Estimate LT pace for 10K, half marathon, and marathon distances.
Power-to-Weight Ratio Calculator
Calculate your cycling power-to-weight ratio (W/kg) and see where you rank from Cat 5 to World Tour pro. Compare climbing ability and race category.
Race Predictor (Riegel) Calculator
Predict race times at any distance using the Riegel formula. Estimate 5K, 10K, half marathon, and marathon times from a single recent race result.
Running Economy Calculator
Calculate your running economy (RE) as oxygen cost per kilometer. Compare your efficiency to elite benchmarks and track improvements with VO2 and pace inputs.
Sports Drink Formulation Calculator
Design your own sports drink with optimal carbohydrate concentration, sodium content, and osmolality. Calculate DIY sports drink recipes for training and racing.
Taper Week Planner Calculator
Plan your pre-race taper with a day-by-day schedule. Reduce training volume 40-60% over 1-3 weeks while maintaining intensity for peak race-day performance.
Triathlon Pacing Calculator
Calculate per-discipline pacing targets from a total triathlon finish time goal. Break down swim, bike, and run paces for Sprint, Olympic, 70.3, and Ironman.
Triathlon Transition Calculator
Calculate total triathlon time including swim, bike, run, T1, and T2 transitions. Plan splits for Sprint, Olympic, 70.3, and Ironman distances.
Ultra Marathon Nutrition Calculator
Calculate calorie, carbohydrate, sodium, and fluid needs for ultra marathon races. Plan nutrition by distance, pace, body weight, and conditions.
VO2max Sport Benchmark Calculator
Compare your VO2max to sport-specific benchmarks by age, gender, and competition level. See your percentile ranking and performance classification for running, cycling, and more.
Sports Performance
57 calculatorsVertical jump, sprint speed, agility, golf handicap, and athletic benchmark calculators.
Agility Score Calculator
Score your agility test performance for T-test, 5-10-5 shuttle, pro agility, and Illinois agility run. Get percentile rankings by sport and position.
Anaerobic Threshold Calculator
Estimate your anaerobic threshold (lactate threshold) heart rate and pace using field tests, max HR, and training data.
Athlete Comparison Calculator
Compare two athletes side-by-side across multiple performance metrics. Enter stats for speed, strength, agility, endurance, and power to get a visual radar-style breakdown.
Biking Life Gain Calculator
Estimate how much life expectancy you gain from regular cycling based on weekly distance, intensity, age, and health research data.
Bowling Handicap Calculator
Calculate your bowling handicap from your average score. Uses standard league basis score and percentage to determine handicap strokes for fair league competition.
Bruce Protocol METs Calculator
Calculate METs, VO2 max, and fitness classification from Bruce Protocol treadmill stress test stage, time, age, and gender.
Burpee Calorie Calculator
Calculate calories burned doing burpees based on body weight, number of reps, pace, and variation type with MET-based formulas.
Calories Burned Biking Calculator
Calculate calories burned cycling based on distance, speed, duration, weight, terrain, and bike type using MET-based formulas.
Calories Burned Standing Calculator
Calculate extra calories burned standing vs sitting based on duration, weight, and activity level. Compare standing desk benefits.
Calories Burned Weight Lifting Calculator
Calculate calories burned during weight training based on exercise type, duration, intensity, body weight, and rest periods.
Chess Elo Rating Calculator
Calculate your new Elo rating after a chess game. Enter your rating, opponent rating, and result to see expected score, rating change, and updated rating.
Deload Planning Calculator
Plan your deload week with optimized volume and intensity reductions. Calculate reduced sets, reps, and weights based on your current program for strength and hypertrophy training.
DIN Ski Binding Calculator
Calculate your ski binding DIN setting based on weight, height, boot sole length, age, and skiing ability level for safe skiing.
DIY Sports Drink Calculator
Create custom sports drink recipes with precise electrolyte ratios, carbohydrate blends, and hydration targets for any activity level.
Duckworth-Lewis Calculator
Calculate revised cricket targets using the Duckworth-Lewis-Stern method for rain-interrupted limited-overs matches.
Dunk Calculator
Calculate your vertical jump needed to dunk a basketball based on height, standing reach, and hand size with training recommendations.
Effective Field Goal Percentage (eFG%) Calculator
Calculate basketball Effective Field Goal Percentage that adjusts for three-pointers being worth more than two-point shots.
Elliptical Calorie Calculator
Calculate calories burned on an elliptical machine based on duration, resistance, incline, speed, and body weight.
Fielding Percentage (FPCT) Calculator
Calculate baseball fielding percentage from putouts, assists, and errors. Compare by position with defensive metrics and range factor.
FIP (Fielding Independent Pitching) Calculator
Calculate baseball FIP to evaluate pitcher performance independent of defense. Compare to ERA with HR, BB, HBP, K, and IP inputs.
Fish Weight Estimator
Estimate fish weight from length and girth measurements using species-specific formulas for catch-and-release anglers.
Fishing Reel Line Capacity Calculator
Calculate how much fishing line fits on your reel based on spool dimensions and line diameter. Convert between mono, fluoro, and braid.
FOC (Front of Center) Arrow Calculator
Calculate arrow Front of Center balance percentage for optimal archery accuracy and penetration with component weight analysis.
GAA (Goals Against Average) Calculator
Calculate hockey goalie GAA from goals allowed and time on ice. Compare to league averages with save percentage and shutout analysis.
Game Score (Baseball Pitching) Calculator
Calculate Bill James Game Score for baseball pitching starts. Evaluate single-game pitching dominance with historical comparisons.
Goalie Save Percentage Calculator
Calculate hockey or soccer goalie save percentage from shots and goals. Track performance with GSAA, shutout rate, and historical benchmarks.
Golf Handicap Calculator
Calculate your World Handicap System (WHS) handicap index from recorded scores. Enter score differentials to get your official-style handicap and course handicap.
Heptathlon & Decathlon Score Calculator
Calculate combined events scoring for heptathlon and decathlon using IAAF scoring tables with event-by-event breakdown and medal projections.
Hiking Time & Calorie Calculator
Calculate hiking duration, calories burned, and pace for trails using Naismith's Rule with elevation, pack weight, terrain, and fitness adjustments.
Hull Speed Calculator
Calculate theoretical maximum hull speed for displacement boats from waterline length. Includes Froude number, speed-length ratio, and power curves.
Human Punch Force Calculator
Estimate punch force in newtons, PSI, and pounds from body weight, technique, and speed. Compare to professional fighter benchmarks.
ICC Player Rating Points Calculator
Calculate ICC cricket player ranking points for batting and bowling using match performance, opponent strength, and format-specific weighting.
Jump Rope Calorie Calculator
Calculate calories burned jumping rope by duration, speed, body weight, and style. Includes MET values, interval timer, and comparison to other cardio exercises.
Kiteboarding Kite Size Calculator
Calculate optimal kite size for kiteboarding based on wind speed, rider weight, board type, and skill level. Includes wind window, depower range, and gear recommendations.
Magic Mile Race Predictor
Predict race times for 5K, 10K, half marathon, and marathon from a 1-mile time trial using Jeff Galloway's Magic Mile formula with pace charts and training zones.
MET Minutes Per Week Calculator
Calculate weekly MET-minutes from your exercise activities. Check if you meet WHO physical activity guidelines with detailed activity tracking.
Net Run Rate (NRR) Calculator
Calculate cricket Net Run Rate for teams in group stages. Includes match-by-match tracking, scenario analysis, and qualification projections.
Periodization Cycle Planner Calculator
Plan your training periodization with phase-by-phase blocks. Calculate mesocycle durations for hypertrophy, strength, peaking, and deload phases leading up to competition day.
Race Time Improvement Calculator
Calculate expected race time improvements based on training volume, consistency, and VO2max gains. Project weekly progress for 5K, 10K, half marathon, and marathon.
Reaction Time Benchmark Calculator
Compare your reaction time to sport-specific benchmarks. Enter your reaction time in milliseconds and see how it ranks for sprinting, motorsport, gaming, combat sports, and more.
Rowing Erg Split Calculator
Convert between rowing ergometer splits, watts, pace, and distance. Calculate 500m splits, predict race times, and compare performances.
Sauna Calories Burned Calculator
Estimate calories burned in a sauna session based on temperature, duration, body weight, and sauna type. Includes health benefits and safety guidelines.
Scuba Diving Weight Calculator
Calculate the right amount of scuba diving ballast weight based on body type, exposure suit, tank, and water type. Includes buoyancy check and trim tips.
Ski Size Calculator
Find your ideal ski length based on height, weight, ability level, skiing style, and terrain preference for the perfect fit.
Snow Shoveling Calories Burned Calculator
Calculate calories burned shoveling snow based on snow type, duration, body weight, and shoveling intensity. Includes heart health safety warnings.
Sprint Speed Calculator
Calculate sprint speed in m/s, km/h, and mph from any distance and time. Compare your speed to sport-specific benchmarks and world-class sprinters.
Stairs Calorie Calculator
Calculate calories burned climbing stairs based on flights, body weight, pace, and whether carrying a load. Includes step count and exercise equivalents.
Steps to Calories Calculator
Convert daily step count to calories burned based on body weight, walking pace, terrain, and stride length. Includes weekly projections and weight loss estimates.
Steps to Kilometers Calculator
Convert step count to kilometers and miles based on stride length, height, and walking pace. Includes daily distance tracking and health goal comparison.
Stride Length Calculator
Calculate your walking and running stride length from height, pace, step count, or known distance. Includes optimal cadence and gait analysis tips.
Tennis NTRP Rating Calculator
Estimate your NTRP (National Tennis Rating Program) level from 1.0 to 7.0 based on a self-assessment of serve, groundstrokes, net play, and match strategy skills.
True Shooting Percentage (TS%) Calculator
Calculate basketball True Shooting Percentage from points, field goal attempts, and free throw attempts. Includes league comparison, era adjustment, and efficiency analysis.
Vertical Jump Power Calculator
Calculate peak power output from your vertical jump using Lewis, Sayers, and Harman formulas. Compare results across methods and see sport-specific percentile rankings.
Wilks Score Calculator
Calculate your Wilks coefficient for powerlifting. Compare strength across weight classes and genders. Includes IPF DOTS and GL coefficients.
Windsurfing Sail Size Calculator
Calculate the ideal windsurfing sail size and board volume based on your weight, wind speed, skill level, and sailing style.
Winning Percentage Calculator
Calculate winning percentage from wins, losses, and ties/draws. Includes streak analysis, Pythagorean expectation, and pace projections for any sport.
Wins Above Replacement (WAR) Calculator
Estimate baseball WAR from batting, pitching, and fielding components. Includes position adjustment, league comparison, and contract value estimation.
Team Sports Stats
16 calculatorsBaseball ERA, batting average, NFL passer rating, basketball PER, and soccer xG calculators.
Baseball ERA Calculator
Calculate earned run average (ERA) for baseball pitchers. Enter earned runs and innings pitched to get ERA, ERA+ estimate, and performance rating classification.
Basketball PER Calculator
Calculate Player Efficiency Rating (PER) using Hollinger's formula. Input NBA box-score stats to estimate per-minute productivity and compare to league-average 15.0 benchmark.
Batting Average Calculator
Calculate batting average (BA), on-base percentage (OBP), and slugging percentage (SLG) from hits, at-bats, and related hitting stats.
Batting Strike Rate Calculator
Calculate cricket batting strike rate, runs per over, boundary percentage, and scoring analysis. Compare with benchmarks across formats.
Bowling Average Calculator
Calculate cricket bowling average, economy rate, strike rate, and key bowling metrics. Compare performance across Test, ODI, and T20 formats.
Cricket Follow-On Calculator
Calculate whether the follow-on can be enforced in Test cricket based on first innings scores. Includes historical analysis and tactical considerations.
Elo Rating Calculator
Calculate Elo rating changes after matches. Estimate expected win probability, rating gain/loss, and track progression across games for chess and sports.
Hockey Save Percentage Calculator
Calculate hockey save percentage (SV%) and goals against average (GAA) for goalies. Compare to NHL benchmarks and classify goaltender performance by tier.
NCAA Passer Rating Calculator
Calculate NCAA passer rating (efficiency) from yards, touchdowns, completions, interceptions, and attempts. The NCAA formula has no cap and differs from the NFL system.
NFL Passer Rating Calculator
Calculate NFL passer rating from completions, attempts, yards, touchdowns, and interceptions using the official NFL formula. Perfect rating is 158.3.
On-Base Percentage Calculator
Calculate on-base percentage (OBP) from hits, walks, HBP, at-bats, and sacrifice flies. Understand the sabermetric significance and compare to league benchmarks.
Slugging Percentage Calculator
Calculate slugging percentage (SLG) and OPS from your batting stats. Break down total bases by hit type and compare to MLB benchmarks for power-hitting analysis.
Soccer Expected Goals (xG) Calculator
Calculate simplified expected goals (xG) based on shot distance, angle, body part, and assist type. Understand what xG means and how it measures shot quality in soccer.
Tennis Ball Usage Calculator
Calculate tennis ball consumption, replacement schedule, and costs. Estimate how many balls you need per session, per month, and per year based on playing habits.
WAR Calculator (Simplified Baseball)
Calculate a simplified Wins Above Replacement (WAR) estimate from batting runs, baserunning, fielding, and positional adjustment. Understand the components of baseball's most comprehensive stat.
WHIP Calculator (Baseball)
Calculate WHIP (Walks plus Hits per Inning Pitched) and related pitching stats. Compare against MLB benchmarks and historical leaders.
Combat Sports
3 calculatorsWeight class finder, reach advantage, and fight odds converter calculators.
Boxing Reach Advantage Calculator
Compare boxing reach, arm length, and ape index between two fighters. Calculate reach differential, height-to-reach ratio, and tactical advantage analysis.
Combat Sports Weight Class Calculator
Find your weight class for boxing, MMA, wrestling, and judo. Enter your weight to see matching divisions, closest weight classes, and estimated cut requirements.
MMA Fight Odds Converter Calculator
Convert MMA and boxing fight odds between American, decimal, and fractional formats. Calculate implied probability, vig-free odds, and potential payout from any odds format.
Clinical Scores
58 calculatorsMedical scoring systems like APACHE II, SOFA, Glasgow Coma Scale, and risk assessment tools.
4Ts Score Calculator (HIT)
Calculate the 4Ts score for heparin-induced thrombocytopenia (HIT) probability. Classifies patients into low, intermediate, or high pretest-probability bands.
A Body Shape Index (ABSI) Calculator
Calculate your A Body Shape Index (ABSI) from waist circumference, height, and weight, plus a rough reference z-score for educational comparison.
Aldrete Score Calculator
Calculate the Modified Aldrete Score for post-anesthesia recovery assessment. Determines PACU discharge readiness based on activity, breathing, circulation, consciousness, and SpO₂.
Alvarado Score Calculator (MANTRELS)
Calculate the Alvarado (MANTRELS) score to assess appendicitis probability. Evaluates symptoms, signs, and lab values to stratify low, intermediate, and high risk.
APACHE II Score Calculator
Calculate the APACHE II score to estimate ICU mortality risk. Uses acute physiology, age, and chronic health status to predict in-hospital death probability.
Apgar Score Calculator
Calculate the Apgar score for newborn assessment at 1, 5, and 10 minutes after birth. Evaluates appearance, pulse, grimace, activity, and respiration.
Barthel Index Calculator
Calculate the Barthel Index for Activities of Daily Living (ADL) assessment. Measures functional independence across 10 activities including feeding, bathing, mobility, and continence.
Beighton Score Calculator
Calculate the Beighton Score for joint hypermobility assessment. Tests 9 points across 5 maneuvers to evaluate generalized joint laxity and EDS screening.
Birthweight Percentile Calculator
Calculate newborn weight percentile by gestational age and sex. Classifies as SGA, AGA, or LGA with z-scores and growth reference data.
Bishop Score Calculator
Calculate the Bishop Score for cervical favorability and labor induction readiness. Assesses dilation, effacement, station, consistency, and position.
BODE Index Calculator
Calculate the BODE Index for COPD prognosis. Combines BMI, airflow obstruction (FEV₁), dyspnea (mMRC), and exercise capacity (6MWD) for mortality prediction.
Braden Scale Calculator
Calculate the Braden Scale score for pressure-injury risk using sensory, moisture, activity, mobility, nutrition, and friction or shear subscales.
Cardiac Index Calculator
Calculate cardiac index, cardiac output, and stroke volume index from heart rate, stroke volume, and body surface area. Classifies hemodynamic status.
Centor Score Calculator (Modified/McIsaac)
Calculate the Modified Centor (McIsaac) score to review Group A strep likelihood context from symptoms and age.
CHA₂DS₂-VASc Score Calculator
Calculate CHA₂DS₂-VASc score for stroke risk in atrial fibrillation. Guides anticoagulation decisions with annual stroke risk estimates.
Child Height Percentile Calculator
Calculate child height percentile by age and sex using CDC growth chart data. Includes mid-parental height prediction, z-scores, and growth classification.
Child Weight Percentile Calculator
Calculate child weight-for-age percentile using CDC growth chart data. Shows percentile, z-scores, and BMI context for ages 2-20 years.
Child-Pugh Score Calculator
Calculate Child-Pugh score and class for cirrhosis severity. Includes class assignment plus historic survival and perioperative risk context.
Diet Risk Score Calculator
Review diet habits across 8 categories with a simplified educational nutrition checklist.
Duke Treadmill Score Calculator
Calculate the Duke Treadmill Score from exercise stress test results. Estimates annual cardiac mortality risk and guides need for coronary angiography.
EASI Score Calculator
Calculate the Eczema Area and Severity Index (EASI) for atopic dermatitis using the standard 4-region weighted scoring method.
ECG Heart Rate Calculator
Calculate heart rate from ECG strips using RR interval, sequence, or large box methods. Classifies rate and computes RR interval, percent max HR, and QTc limits.
Epworth Sleepiness Scale (ESS) Calculator
Measure daytime sleepiness with the Epworth Sleepiness Scale. Evaluates dozing likelihood in 8 situations to screen for sleep disorders like obstructive sleep apnea.
Fatigue Severity Scale (FSS) Calculator
Measure self-reported fatigue burden with the 9-item Fatigue Severity Scale and its mean 1-to-7 score.
Fetal Weight Percentile Calculator
Estimate fetal weight using the Hadlock formula from ultrasound biometry. Shows EFW plus an approximate gestational-age percentile reference.
Frailty Index Calculator
Calculate the Frailty Index from 20 deficit domains. Assesses accumulation of health deficits to classify frailty severity for surgical risk and geriatric care planning.
Framingham Risk Score Calculator
Calculate 10-year cardiovascular disease risk using the Framingham Risk Score. Evaluates age, sex, cholesterol, blood pressure, smoking, and diabetes.
Gut Microbiome Score Calculator
Review gut-health-related diet and lifestyle habits with a simplified educational checklist.
HAS-BLED Score Calculator
Calculate the HAS-BLED score for major bleeding risk in atrial fibrillation patients on anticoagulation. Guides risk factor modification, not anticoagulation decisions.
Head Circumference Percentile Calculator
Calculate pediatric head circumference percentile and z-score as a quick LMS-based screening reference for birth to 36 months.
Heart Failure Life Expectancy Calculator
Review heart-failure prognosis context using NYHA class, ejection fraction, comorbidities, natriuretic-peptide level, and device status in an educational worksheet.
HEART Score Calculator
Calculate the HEART score for chest pain risk stratification in the emergency department. Predicts 6-week major adverse cardiac events (MACE) risk.
IQ Score Percentile Converter
Convert a reported IQ-style score into percentile and z-score terms using the selected scale mean and standard deviation.
Light's Criteria Calculator
Use Light's Criteria to classify pleural effusions as transudative or exudative. Calculates protein ratio, LDH ratio, and albumin gradient for differential diagnosis.
Lille Score Calculator
Calculate the Lille Model score for early bilirubin response in severe alcoholic hepatitis and review the result as prognostic context after the first treatment week.
LRINEC Score Calculator
Calculate the Laboratory Risk Indicator for Necrotizing Fasciitis (LRINEC) score. Screens for necrotizing soft tissue infections from routine lab values.
LV Mass Index Calculator
Calculate left ventricular mass index from echocardiographic measurements. Classifies LV hypertrophy severity and determines LV geometry pattern.
MELD Score Calculator
Calculate MELD, MELD-Na, and MELD 3.0 scores for liver disease severity and 3-month mortality-oriented reference context.
Mentzer Index Calculator
Calculate the Mentzer Index and 5 additional discrimination indices to differentiate thalassemia trait from iron deficiency anemia in microcytic anemia.
MEWS Score Calculator
Calculate the Modified Early Warning Score (MEWS) for inpatient deterioration detection and place the result in common ward-monitoring context bands.
Morse Fall Scale Calculator
Calculate the Morse Fall Scale score to assess inpatient fall risk across six standard bedside factors.
NAFLD Fibrosis Score Calculator
Calculate the NAFLD Fibrosis Score (NFS) to assess liver fibrosis severity in fatty liver disease. Also computes FIB-4 and APRI for comparison.
Osteoporosis Risk Score Calculator
Estimate fracture risk from common osteoporosis risk factors with a simplified educational screening checklist.
Oxygenation Index Calculator
Calculate Oxygenation Index (OI), P/F ratio, and A-a gradient for mechanically ventilated patients. Adds pressure-aware oxygenation context alongside standard gas-exchange measures.
Padua Prediction Score Calculator
Calculate the Padua VTE risk score for medical inpatients. Uses 11 risk factors to frame short-term hospital VTE risk and prevention discussions.
Pearl Index Calculator
Calculate the Pearl Index for contraceptive failure rate per 100 women-years and compare typical versus perfect use.
Pediatric Epworth Sleepiness Scale Calculator
Screen for daytime sleepiness in children and adolescents with an Epworth-style 8-item questionnaire and raw total score.
PERC Rule Calculator
Review the Pulmonary Embolism Rule-Out Criteria (PERC) and see whether all eight bedside criteria are absent in a low-risk worksheet setting.
qSOFA Score Calculator
Calculate the quick SOFA (qSOFA) score for bedside infection-risk assessment. Uses 3 simple criteria to flag patients with suspected infection who may need broader reassessment.
Revised Geneva Score Calculator
Calculate the Revised Geneva Score for pulmonary embolism probability. Objective, standardized PE risk assessment using 8 clinical criteria without subjective judgment.
Revised Trauma Score Calculator
Calculate the Revised Trauma Score (RTS) for trauma triage and prognostication. Uses GCS, systolic BP, and respiratory rate for field and hospital assessment.
Shock Index Calculator
Calculate Shock Index (SI), Modified Shock Index, MAP, and pulse pressure for rapid hemodynamic assessment. Includes hemorrhage-context bands and transfusion-risk discussion.
SNAP-II / SNAPPE-II Score Calculator
Calculate SNAP-II and SNAPPE-II neonatal illness-severity scores using the worst values from the first 12 hours after NICU admission.
SOFA Score Calculator
Calculate the Sequential Organ Failure Assessment (SOFA) score across six organ systems and review mortality-oriented severity context.
TIMI Score for STEMI Calculator
Calculate the TIMI STEMI score as a bedside prognostic summary using the original fibrinolytic-era 30-day mortality framework.
TIMI Score for UA/NSTEMI Calculator
Calculate the TIMI UA/NSTEMI score as a bedside prognostic summary using the original 14-day composite event framework.
VBAC Risk Score Calculator
Estimate VBAC success with a legacy Grobman-style counseling model, framed as discussion support rather than a stand-alone eligibility rule.
Wells Score for PE Calculator
Calculate the Wells Score for pulmonary embolism probability. Summarizes the standard 7 criteria into low, moderate, or high pretest-probability bands.
Pregnancy & Pediatric
29 calculatorsPregnancy tests, due dates, pediatric dosing, vaccine schedules, and child growth calculators.
Birth Control Cost Calculator
Compare the total cost of birth control methods over time. Factor in insurance coverage, copays, and method effectiveness for informed contraception decisions.
Clomid Ovulation Calculator
Estimate ovulation timing, fertile-window timing, and cycle milestones when taking Clomid (clomiphene citrate).
False Negative Pregnancy Test Calculator
Estimate how timing, test sensitivity, and urine concentration can affect the chance of a false negative pregnancy test, and when repeat testing may add useful context.
Ireland Vaccine Queue Estimator
Estimate your position in a vaccine rollout queue using Ireland-style priority groups. Adjust population, supply rate, and priority tiers to model any campaign.
Pediatric Blood Product Worksheet
Estimate pediatric blood-product volumes for pRBCs, platelets, FFP, cryoprecipitate, and whole blood, with blood-volume context and reference infusion rates.
Pediatric GFR Calculator
Estimate glomerular filtration rate in children using Schwartz, Counahan-Barratt, and CKiD formulas. Includes CKD staging and age-specific normal ranges.
Pediatric Maintenance Fluids Calculator
Calculate IV maintenance fluid rates for children using the Holliday-Segar (4-2-1) method. Includes dehydration correction and electrolyte requirements.
Positive Pregnancy Test Calculator
After a positive pregnancy test, estimate gestational age, hCG projections, due date, and key pregnancy milestones based on DPO and hCG levels.
Pregnancy Test at 3 Weeks Calculator
Estimate how likely a pregnancy test is to detect pregnancy at about 3 weeks from the last menstrual period. Frames very-early testing with implantation timing, hCG levels, and test sensitivity.
Pregnancy Test Calculator
Estimate when a pregnancy test is more or less likely to detect pregnancy based on DPO, cycle timing, and test type. Compare general home, early, and blood-test timing context.
Stillbirth Risk Assessment Calculator
Review stillbirth-related risk factors in a simplified educational worksheet that compares selected factors with broad population baseline rates.
Urine Pregnancy Test Calculator
Compare home pregnancy test brands by sensitivity and cost, and factor in urine concentration, hold time, and read window as timing and sensitivity reference points.
Vaccine Efficacy Calculator
Calculate vaccine efficacy from clinical trial data: relative risk, 95% confidence interval, NNV, absolute risk reduction, and statistical significance.
Vaccine Immunity Duration Calculator
Estimate how long vaccine immunity lasts: model antibody decay, T-cell memory, and booster timing based on vaccine type, age, and immunological factors.
Vaccine Production Calculator
Model vaccine manufacturing capacity and timelines: compare platforms (mRNA, viral vector, inactivated), estimate ramp-up, costs, and cold chain requirements.
Vaccine Queue Estimator — Australia
Estimate your place in a vaccine queue for Australia. Adjustable population, supply rates, priority groups, and uptake parameters for any vaccine rollout.
Vaccine Queue Estimator — Canada
Estimate your vaccine queue position in Canada. Model rollout timelines with adjustable population, supply, priority groups, and uptake parameters.
Vaccine Queue Estimator — England
Estimate your vaccine queue position in England. Model rollout timelines with adjustable population, supply, priority groups, and uptake parameters.
Vaccine Queue Estimator — India
Estimate your vaccine queue position in India. Model rollout timelines with adjustable population, supply, priority groups, and uptake parameters.
Vaccine Queue Estimator — Malaysia
Estimate your vaccine queue position in Malaysia. Model rollout timelines with adjustable population, supply, priority groups, and uptake parameters.
Vaccine Queue Estimator — Netherlands
Estimate your vaccine queue position in the Netherlands. Model rollout timelines with adjustable population, supply, priority groups, and uptake.
Vaccine Queue Estimator — Northern Ireland
Estimate your vaccine queue position in Northern Ireland. Model rollout timelines with adjustable population, supply, priority groups, and uptake.
Vaccine Queue Estimator — Philippines
Estimate your vaccine queue position in the Philippines. Model rollout timelines with adjustable population, supply, priority groups, and uptake.
Vaccine Queue Estimator — Scotland
Estimate your vaccine queue position in Scotland. Model rollout timelines with adjustable population, supply, priority groups, and uptake parameters.
Vaccine Queue Estimator — South Africa
Estimate your vaccine queue position in South Africa. Model rollout timelines with adjustable population, supply, priority groups, and uptake.
Vaccine Queue Estimator — United Kingdom
Estimate your vaccine queue position in the UK. Model rollout timelines with adjustable population, supply, JCVI priority groups, and uptake.
Vaccine Queue Estimator — Wales
Estimate your vaccine queue position in Wales. Model rollout timelines with adjustable population, supply, priority groups, and uptake parameters.
Vaccine Strategy Calculator
Model vaccine distribution strategies: compare dosing approaches, estimate rollout timelines, and analyze supply constraints for any population and vaccine.
VTE Risk in Pregnancy Calculator
Review pregnancy and postpartum VTE risk factors in a structured checklist that keeps stage and BMI context visible for educational use.
Dosing & Medications
26 calculatorsDrug dosage, half-life, pediatric dosing, and medication conversion calculators.
Adderall Dosage Calculator
Calculate appropriate Adderall (amphetamine) dosage by age, weight, and formulation. Includes titration schedules, IR vs XR guidance, and safety reference tables.
Aleve Dosage Calculator
Calculate Aleve (naproxen sodium) dosing by age, weight, and condition. Includes OTC max limits, dosing schedules, risk factors, and safety reference tables.
Amoxicillin Pediatric Dosage Calculator
Calculate pediatric amoxicillin doses by weight, indication, and formulation. Includes suspension volume, dosing schedules, and indication-specific reference tables.
Benadryl Dosage Calculator
Calculate diphenhydramine (Benadryl) dosage by age, weight, and formulation. Includes pediatric dosing, OTC limits, side effect tables, and sedation risk assessment.
Cefdinir Dosage Calculator
Calculate cefdinir (Omnicef) dosage for pediatric and adult patients by weight, indication, and renal function with suspension volume conversion.
Drug Half-Life Calculator
Calculate drug elimination, time to clearance, steady-state concentrations, and accumulation factor from half-life and dosing interval.
Fresh Frozen Plasma (FFP) Dose Reference Calculator
Calculate FFP reference volumes by weight and scenario for coagulopathy review, vitamin K antagonist reversal review, plasma exchange, and other transfusion-planning worksheets.
Gabapentin Dosage Calculator
Calculate gabapentin dose titration schedules for neuropathic pain, seizures, and off-label uses with renal adjustments and titration planning.
Hydroxychloroquine Dosage Calculator
Calculate hydroxychloroquine (Plaquenil) reference dosing by actual and ideal body weight with retinal toxicity risk context using the AAO framework summarized on this page.
Ibuprofen Dosage Calculator
Calculate ibuprofen dosage for adults and children by age and weight with formulation-specific volumes, pediatric dosing chart, and safety checks.
Infant Tylenol (Acetaminophen) Dosage Calculator
Calculate infant and children's acetaminophen (Tylenol) dosage by weight with multiple formulations, dosing chart, and toxicity thresholds.
Insulin Dosage Calculator
Calculate insulin doses including basal, bolus, correction factor, and carb ratio using the 1800 rule, 500 rule, and weight-based TDD estimation.
IVIG Dose Calculator
Calculate intravenous immunoglobulin (IVIG) dose by weight and indication including ITP, Kawasaki, Guillain-Barré, CIDP, and immunodeficiency as a reference worksheet.
Levothyroxine Dosage Calculator
Calculate levothyroxine (Synthroid) dose by weight, age, and indication with TSH-based dose adjustment, pregnancy dosing, alternating-day schedules, and tablet strength selection.
Lidocaine Dose Calculator
Calculate lidocaine maximum-dose and volume conversions by weight with or without epinephrine as a reference worksheet.
Medication Dosage Calculator
Calculate medication dosages using weight-based, BSA-based, or concentration-based methods with pediatric presets, max dose caps, and volume conversions.
Melatonin Dosage Calculator
Calculate the right melatonin dose by age, weight, and sleep issue type. Covers pediatric dosing, jet lag protocols, formulation comparison, and timing guidance.
Paracetamol Dosage Calculator
Calculate safe paracetamol (acetaminophen) doses for adults and children by weight. Includes pediatric liquid dosing, liver risk assessment, and combination product warnings.
Pediatric Dose Calculator
Calculate pediatric drug doses using Young's Rule, Clark's Rule, BSA method, and mg/kg dosing. Compare all four methods side-by-side with safety checks.
Pediatric Epinephrine Dose Calculator
Calculate pediatric epinephrine doses for anaphylaxis, cardiac arrest, bradycardia, croup, and asthma. Weight-based dosing with concentration conversions and autoinjector guidance.
Peptide Dosage Calculator
Calculate peptide reconstitution and injection doses. Converts vial content, bacteriostatic water volume, and syringe units for BPC-157, TB-500, Ipamorelin, CJC-1295, and more.
Radiation Dose Calculator
Calculate and compare radiation doses from medical imaging, occupational exposure, and natural background. Converts between Sv, Gy, rem, rad with risk assessment and equivalents.
Tramadol Dosage Calculator
Calculate tramadol dosing by weight with renal, hepatic, and elderly adjustments. Includes MME conversion, serotonin syndrome risk, seizure warnings, and drug interaction tables.
Tylenol Dosage Calculator
Review Tylenol (acetaminophen) reference doses for adults and children. Track daily total from all APAP sources, pediatric liquid dosing by weight, and daily limit with liver disease adjustment.
Tylenol Overdose Calculator
Review acetaminophen overdose dose severity, Rumack-Matthew nomogram thresholds, and liver-injury context in one worksheet.
Warfarin INR Review Worksheet
Compare a current INR with common target ranges and review rough weekly-dose math, interaction context, and tablet-strength reference information for warfarin follow-up discussions.
Lab Values
24 calculatorsBlood test interpretation, hemoglobin A1c, lipid panels, and renal function calculators.
Age-Adjusted D-Dimer Calculator
Calculate age-adjusted D-dimer thresholds for patients over 50 and compare common FEU and DDU units in the standard VTE rule-out pathway.
Albumin/Globulin Ratio Calculator
Calculate the A/G ratio from serum albumin and globulin or total protein values. Includes interpretation guide and associated conditions.
Arterial Blood Gas (ABG) Interpreter
Review arterial blood gas values including pH, PaCO₂, HCO₃⁻, base excess, anion gap, and compensation patterns for acid-base interpretation.
Blood Donation Eligibility & Volume Calculator
Check blood donation eligibility, estimate donation volume as a percentage of blood volume, and compare donation types with recovery intervals.
Blood hCG Pregnancy Test Interpreter
Review quantitative blood hCG trends with doubling time calculation, discriminatory-zone context, and gestational-age reference ranges.
Blood Type Compatibility & Inheritance Calculator
Determine blood type compatibility for transfusion, calculate possible child blood types from parental genetics, and view population frequency data.
Blood Volume Calculator
Estimate total blood volume using Nadler, Allen, and simple mL/kg methods. Includes RBC and plasma volume calculation with hematocrit.
BUN/Creatinine Ratio Calculator
Calculate the BUN/Creatinine ratio to differentiate prerenal, intrinsic renal, and postrenal causes of kidney dysfunction. Includes eGFR and differential diagnosis.
Estimated Average Glucose (eAG) Calculator
Convert HbA1c to estimated average glucose (eAG) in mg/dL or mmol/L, or reverse-calculate HbA1c from average glucose with broad diabetes threshold context.
Estimated Blood Loss Calculator
Calculate estimated blood loss from hematocrit changes using the Gross formula, with ATLS hemorrhage-class reference context and replacement-volume equivalents.
Hemoglobin A1c Calculator
Convert HbA1c between NGSP (%) and IFCC (mmol/mol), estimate average glucose, and review broad diabetes threshold context.
INR Calculator
Calculate International Normalized Ratio from PT and ISI, then compare the result with common therapeutic ranges in one anticoagulation reference worksheet.
Iron Deficiency Calculator
Review ferritin, serum iron, TIBC, transferrin saturation, and hemoglobin in one worksheet, with a rough Ganzoni iron-deficit estimate and inflammation context when CRP is available.
LDL Cholesterol Calculator
Calculate LDL cholesterol with Friedewald and Martin-Hopkins equations, then compare it with non-HDL cholesterol and common lipid ratios in one worksheet.
Newborn Hyperbilirubinemia Assessment Calculator
Review neonatal jaundice context using Bhutani nomogram zones, simplified AAP reference thresholds, bilirubin rise, and direct-bilirubin fraction.
Pediatric Blood Volume Calculator
Estimate blood volume in children by age group and weight, calculate maximum allowable blood loss (MABL), pRBC transfusion volumes, and pediatric hemorrhage classification.
Plasma Osmolality Calculator
Calculate plasma osmolality, effective osmolality (tonicity), osmol gap, corrected sodium for hyperglycemia, and a simple free-water estimate.
PSA Density Calculator
Calculate PSA density from total PSA and prostate volume, review free/total PSA ratio, and compare the result with age-specific and simple BPH-context reference ranges.
PSA Doubling Time Calculator
Calculate PSA doubling time (PSADT) and velocity from serial PSA values, then review the trend with a cautious kinetic context and illustrative future projections.
RBC Indices Calculator
Calculate MCV, MCH, and MCHC from CBC values, classify anemia as microcytic/normocytic/macrocytic, compute Mentzer index for thalassemia screening, and assess reticulocyte production index.
Serum Osmolality Calculator
Calculate serum osmolality, effective osmolality (tonicity), osmol gap, corrected sodium, and a rough free-water estimate in one interpretation worksheet.
Transferrin & Iron Panel Calculator
Calculate TSAT, UIBC, and TIBC from transferrin and serum iron, then review the iron-panel pattern alongside ferritin and CRP context.
Venous Blood Gas (VBG) Calculator
Review venous blood gas pH, pCO₂, and HCO₃⁻, calculate anion gap with albumin correction, assess compensation, and estimate arterial values from venous samples.
VLDL Cholesterol Calculator
Estimate VLDL cholesterol from triglycerides or the full lipid panel, then compare it with non-HDL cholesterol, remnant cholesterol, and common lipid ratios.
Cardiology
8 calculatorsCardiac output, valve area, mean arterial pressure, and echocardiogram calculators.
Aortic Valve Area Calculator
Calculate aortic valve area using the Gorlin formula or continuity equation. Classify aortic stenosis severity with AVAI indexing.
Cardiac Output Calculator
Calculate cardiac output using the Fick principle or thermodilution. Includes cardiac index, stroke volume, and systemic vascular resistance.
Doppler Echo Cardiac Output Calculator
Calculate cardiac output from Doppler echocardiography using LVOT VTI and diameter. Includes stroke volume, cardiac index, and SV index.
ECG Box to Time Converter
Convert ECG small and large boxes to milliseconds and seconds. Estimate heart rate from RR interval with support for 25 mm/s and 50 mm/s paper speeds.
Mean Arterial Pressure (MAP) Calculator
Calculate MAP from systolic and diastolic blood pressure. Includes pulse pressure, shock index, rate-pressure product, and BP classification.
Mitral Valve Area Calculator
Calculate mitral valve area using pressure half-time, Gorlin formula, or planimetry. Classify mitral stenosis severity with indexed MVA.
Pediatric Blood Pressure Percentile Calculator
Determine pediatric blood pressure percentiles by age, sex, and height. Classify BP as normal, elevated, stage 1, or stage 2 hypertension using the AAP pediatric guideline framework.
Stroke Volume Calculator
Calculate stroke volume using EDV − ESV (volumetric) or Doppler LVOT VTI method. Includes ejection fraction, cardiac output, and indexed values.
Pulmonary
7 calculatorsLung capacity, tidal volume, FEV1/FVC ratio, and respiratory function calculators.
FEV1/FVC Ratio Calculator
Calculate the FEV1/FVC ratio with percent-predicted context, fixed-ratio obstruction screening, and bronchodilator response framing.
Lung Cancer Risk Calculator for Smokers
Estimate smoking-related lung cancer risk with a simplified worksheet and check low-dose CT screening eligibility against published screening criteria.
Lung Nodule Growth Rate Calculator
Calculate lung-nodule volume doubling time and compare it with Fleischner and Lung-RADS reference frameworks in a follow-up worksheet.
PaO2/FiO2 Ratio (P/F Ratio) Calculator
Calculate the P/F ratio as a bedside oxygenation measure and review it alongside Berlin ARDS severity bands, A-a gradient, oxygenation index, and estimated S/F ratio.
Physiologic Dead Space Calculator
Calculate physiologic dead space using the Bohr equation. Includes VD/VT ratio, alveolar ventilation, and dead space composition breakdown.
Tidal Volume Calculator (Lung-Protective Ventilation)
Calculate an ideal-body-weight-based tidal-volume worksheet and compare height-based targets across common ventilation contexts.
Total Lung Capacity Calculator
Calculate predicted total lung capacity, vital capacity, residual volume, and FRC by age, height, and sex. Visual breakdown of all lung volumes.
Emergency & Surgery
2 calculatorsTrauma scores, sepsis assessment, and surgical risk calculators.
Reticulocyte Count & Production Index Calculator
Calculate corrected reticulocyte count (CRC), reticulocyte production index (RPI), and absolute count. Interpret marrow response in anemia.
Sepsis Screening Worksheet (SIRS, qSOFA, simplified SOFA)
Screen infection-related organ dysfunction using SIRS, qSOFA, and a simplified SOFA-style worksheet with sepsis and septic-shock context.