Health & Fitness
Body Fat Calculator
Estimate body fat percentage using the U.S. Navy method.
How this body fat calculator works
The body fat calculator takes the numbers you enter and applies a standard formula for this kind of calculation, showing the result instantly with no page reload. Estimate body fat percentage using the U.S. Navy method.
Everything runs client-side in JavaScript, so your inputs never leave your device — there's no server, no account and no tracking involved in getting your answer.
Frequently asked questions
It's a tape-measure estimate, typically within a few percentage points of more precise methods like DEXA scans — accurate enough to track trends, not exact enough for clinical use.