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 Body Metrics Calculators
17 toolsBMI, ideal weight, BMR, TDEE, and body measurement calculators. Browse our free body metrics tools below — no sign-up required.
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.