Body Fat Calculator

Estimate body fat % from simple tape measurements (US Navy method).

Body fat
0%
Fat mass
Lean mass
The US Navy method is a quick tape-measure estimate and is less precise than a DEXA scan or calipers. Measure at the right spots (neck below larynx, waist at navel, hips at widest). For accurate assessment, consult a professional.

About the US Navy method

It uses log ratios of your neck, waist and height (plus hips for women) to estimate body fat. Categories (men): 6–13% athletic, 14–17% fitness, 18–24% average, 25%+ high. Women run higher: 14–20% athletic, 21–24% fitness, 25–31% average, 32%+ high. Some fat is essential.

FAQs

How does the Navy method work?

It estimates body fat from neck, waist and height (plus hips for women). Quick, but less precise than a DEXA scan.

What's a healthy body fat %?

Men: 14–17% fitness, 18–24% average. Women: 21–24% fitness, 25–31% average. Some fat is essential.