Body Composition Calculators
Calculate BMI, body fat percentage, lean body mass, waist-hip ratio and more.
Adult BMI Calculator
Body Mass Index with WHO/CDC classification.
Teen BMI Calculator
BMI-for-age percentiles for ages 2–19.
Body Fat Percentage
Estimate body fat using Navy method and BMI-based formulas.
Lean Body Mass
Calculate lean body mass from weight and body fat.
FFMI Calculator
Fat-Free Mass Index for body composition assessment.
Waist-Hip Ratio
Cardiovascular risk indicator based on waist/hip circumference.
Waist-Height Ratio
Central obesity indicator: waist circumference ÷ height.
Body Age Calculator
Estimated biological age based on BMI and lifestyle factors.
Height Weight Ratio
Simple weight-to-height ratio with population percentiles.
Ideal Body Weight
Devine, Robinson, Miller and Hamwi formulas.
Standard Weight Chart
WHO and NHANES weight ranges by height.
About Body Composition
Calculate BMI, body fat percentage, lean body mass, waist-hip ratio and more. All calculations follow evidence-based formulas from WHO, CDC, NIH, USDA and other public health standards.