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Body Composition
Measure and track your body composition with tools for BMI, body fat percentage, lean body mass, ideal weight, and body measurements. Calculators use clinically validated methods — Navy tape measure, Boer and Hume lean mass formulas, and multiple BMI classification systems including Asian-specific thresholds — so your numbers are comparable across assessments.
Use our free body fat calculator to estimate your body fat percentage with the US Navy tape measurement method. Instant results.
Use our free lean body mass calculator to find your fat-free mass from weight and height using the Boer, James, and Hume formulas.
Use our free BMI calculator to calculate your Body Mass Index from weight and height with instant WHO health classification.
Use our free ideal weight calculator to find your healthy weight range using Devine, Hamwi, Robinson, and Miller formulas.
Use our free waist-to-height ratio calculator to measure cardiovascular health risk — a more accurate predictor than BMI alone.
Use our free waist to hip ratio calculator to measure your body shape and assess cardiovascular and metabolic health risk.
Estimate body composition from girth measurements using established formulas with our free body measurement calculator.
Use our free body recomposition calculator to project changes in fat mass and lean mass over time with a personalised plan.
Where to start: use the Body Fat Calculator to get your current fat percentage, then run the Lean Body Mass Calculator to get your fat-free mass and set protein targets. If you are working toward simultaneous fat loss and muscle gain, the Body Recomposition Calculator gives you a 12-week projection.