Body Fat Calculator

CaliforniaCalculator.net

Enter your measurements and choose an estimation method

Body measurements

Sex
years
ftin
lb
in
in

Estimated Body Fat21.1%Navy method

This is an equation-based estimate, not a direct measurement. Compare methods and repeat measurements consistently.

Estimated fat mass38.0 lbWeight × estimated body-fat percentage
Estimated lean mass142.0 lbWeight minus estimated fat mass
Waist-to-height ratio0.514Waist circumference ÷ height
Method spread4.0 pointsHighest estimate minus lowest estimate

Estimated Body Composition

Fat mass and lean mass based on the selected formula and entered weight.

Method Comparison

The same inputs can produce different estimates because each equation models body composition differently.

  • Navy: 21.1%
  • RFM: 25.1%
  • BMI-based: 21.7%

Body-fat equations estimate population relationships and can differ from direct assessment. Do not use this result to diagnose a condition, determine pregnancy-related body composition, or make an official military eligibility decision.

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