Body Fat % Calculator

Estimate body fat percentage using the U.S. Navy circumference method — no calipers required.

in
in
in
lbs

U.S. Navy Method

BF% = 86.01×log₁₀(waist−neck) − 70.04×log₁₀(height) + 36.76

All measurements in inches. Developed by Hodgdon & Beckett (1984).

Body Fat
17.51%
Fitness
Fat Mass
30.65
lbs
Lean Mass
144.35
lbs

Body Composition

17.5%
82.5%
Fat Mass Lean Mass

Body Fat Categories (Male)

Essential Fat
2–5%
Athletes
6–13%
Fitness
14–17%You
Average
18–24%
Obese
25%+