Body Fat Calculator (U.S. Navy Method)

The most practical at-home method is the U.S. Navy tape method: measure your height, neck, and waist (plus hips for women) with a soft tape, and the formula estimates your body fat percentage. This calculator runs that formula for you.

A tape-measure method the U.S. Navy developed to estimate body composition. Men use height, neck, and waist; women add hips. The formulas use base-10 logarithms of the measurements, all converted to centimeters.

Commonly cited healthy bands: men 14–24%, women 21–31%. Athletes sit lower (men 6–13%, women 14–20%), while 25%+ for men and 32%+ for women is in the obese range.

Typically within about 3–4 percentage points of DEXA scans for most people — decent for tracking change over time. Consistent measuring (same spots, same tension, morning) matters more than any single reading.

No. These are estimates for education only — not medical advice. Talk to a healthcare professional about what is healthy for you.