Body Composition
Anthropometric formulas, logarithmic circumferences, lean mass tracking, and natural muscular thresholds.
5 Educational Calculators in this Suite
Select any calculator below to open its dedicated analytics console.
US Navy Body Fat Percentage Calculator
Empirical body circumference method adopted by the United States Department of Defense for estimated body composition assessment.
Lean Body Mass (LBM) & FFMI Calculator
Calculate Fat-Free Mass Index (FFMI) and normalized FFMI to evaluate natural muscularity benchmarks based on Kouri et al. cohorts.
Ideal Body Weight & Bone Frame Size Calculator
Compare Devine, Robinson, Miller, and Hamwi clinical equations with wrist circumference bone frame size calibrations.
Maximum Muscular Potential Estimator
Estimate your natural reference range for drug-free lean mass and maximum muscle girths using Casey Butt and Martin Berkhan models.
Waist-to-Height Ratio (WHtR) & Health Risk Calculator
Screen central adiposity and cardiometabolic risk using the Ashwell Shape Chart methodology. WHtR is a screening indicator associated with cardiometabolic risk.
Physiological Foundations: Body Composition
Scientific standards, published formulas, and estimated parameters
Calculators within the Body Composition category are based on published sports science formulas and population cohorts. All mathematical models run client-side to protect your personal privacy without requiring server-side storage.