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.
Free Weight Loss Calculators
22 toolsWeight loss timelines, deficit planning, and safe rate calculators. Browse our free weight loss tools below — no sign-up required.
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.