Body Fat Calculator (Navy Method)
Estimate body-fat % using the trusted U.S. Navy circumference method.
About the Body Fat Calculator (Navy Method)
Body Fat Calculator (Navy Method) gives a surprisingly accurate body-fat estimate using just a tape measure and your height. Originally developed for the U.S. Navy, it's within ±3% of DEXA-scan accuracy for most people.
How to use
- Select gender and enter height in centimetres.
- Measure neck (below larynx), waist (at navel) and — for women — hip (widest point).
- Click Calculate for body-fat % and category.
Benefits & key features
- Free, fast and surprisingly accurate (±3% vs DEXA).
- No equipment beyond a soft tape measure.
- Repeatable weekly to track progress.
- Pairs with BMI and TDEE for a complete body-composition picture.
Pro tip
Measure first thing in the morning, after the bathroom and before any food or water, for the most consistent week-to-week comparison.