Estimate body fat percentage with the US Navy circumference equation. An estimate, not a body-composition measurement.
| Body Fat % | — |
| Category | — |
The category labels follow a commonly used fitness chart (American Council on Exercise style). Men: Essential fat 2–5%, Athletes 6–13%, Fitness 14–17%, Average 18–24%, High 25% and above. Women: Essential 10–13%, Athletes 14–20%, Fitness 21–24%, Average 25–31%, High 32% and above. These are fitness-chart ranges, not medical diagnostic thresholds. Tape-measure estimates can be off by several percentage points, so use the result to track your own trend and talk to a doctor or a qualified professional about health decisions. The equation (Hodgdon and Beckett, US Navy, 1984; coefficients as listed on this course page) takes the waist at the navel for men and the narrowest waist for women, the neck below the larynx, and the hip at its widest. It was developed in military samples and may not suit every body type, age or ethnic group.