Body fat calculator
Your body fat percentage from a tape measure, with the US Navy method. Free, nothing leaves your browser.
Your body fat
—% body fat
Measure with a tape and fill in your numbers.
Fabee keeps your food log, so you can see what moves the trend.
DownloadAn estimate for adults, not medical advice. Pregnant, under 18 or managing a health condition? Ask your doctor.
How it works
The US Navy method estimates body fat from circumferences: waist at the navel and neck for men; waist at its narrowest, hips and neck for women; plus height. Measure on bare skin, relaxed, tape level and snug but not tight.
It’s an estimate, about 3 percentage points either way for most people. The trend over weeks, measured the same way, tells you more than one number.