How to Use Body Fat Calculator
Estimate your body fat percentage from simple tape measurements (neck, waist and — for women — hips) using the U.S. Navy method, and see which fitness category you fall into.
Open the Body Fat Calculator tool →What is Body Fat Calculator?
Estimate your body fat percentage using the U.S. Navy circumference method. It's completely free, needs no sign-up, and runs entirely in your browser — so it's fast and private.
How to use Body Fat Calculator
- Open the Body Fat Calculator tool.
- Enter your details or values.
- The result is calculated instantly.
- Copy or use the result. Everything runs in your browser — nothing is uploaded.
Frequently asked questions
Which method does it use?
The U.S. Navy circumference method, which estimates body fat from tape measurements rather than a scale.
How accurate is it?
It's a reasonable estimate but less precise than methods like DEXA. Measure carefully and consistently for the best results.
Is this medical advice?
No — use it as a general guide, not a diagnosis.
Ready to try it?
Open Body Fat Calculator →