Body Fat Calculator

Estimate body fat percentage from tape measurements using the US Navy circumference method. Measure the neck below the larynx, the waist at the navel, and (for women) the hips at their widest point.

Measurements

Sex

Height (in)

Neck (in)

Waist (in)

Result

Enter your measurements and press Calculate.

Reading the result

Typical reference bands for men: athletes 6–13%, fitness 14–17%, average 18–24%, 25%+ high. For women: athletes 14–20%, fitness 21–24%, average 25–31%, 32%+ high. Tape-measure estimates are within a few points of lab methods at best — use the trend over time, not a single reading.