Body Composition Calculators
Understand weight, body fat, metabolic baseline, and health-risk markers. Every tool is free, private, responsive, and designed to explain its result clearly.
10 specialized toolsBMI Calculator
Calculate your Body Mass Index and healthy weight range.
Open calculator 02Body CompositionBMI Prime Calculator
Compare your BMI with the upper threshold of the healthy range.
Open calculator 03Body CompositionBMR Calculator
Estimate the calories your body burns at complete rest.
Open calculator 04Body CompositionTDEE Calculator
Estimate your total daily energy expenditure and maintenance calories.
Open calculator 05Body CompositionBody Fat Calculator
Estimate body fat percentage with the U.S. Navy circumference method.
Open calculator 06Body CompositionLean Body Mass Calculator
Estimate fat-free body mass from weight and circumference measurements.
Open calculator 07Body CompositionFFMI Calculator
Assess muscular development relative to your height.
Open calculator 08Body CompositionIdeal Weight Calculator
Compare estimated ideal weights across established clinical formulas.
Open calculator 09Body CompositionWaist-to-Height Ratio Calculator
Screen central adiposity with your waist-to-height ratio.
Open calculator 10Body CompositionFitness Age Calculator
Estimate fitness age from resting heart rate, BMI, and age.
Open calculatorPrivate calculations, clearer decisions
All calculations run in your browser. We do not require an account or store your measurements. Results are educational estimates and should be interpreted within your health and training context.
Learn about our methodology →