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Body Fat Calculator
Estimate body fat percentage from a few tape measurements, using the US Navy method.
Estimated body fat
How to measure: use a soft tape, snug but not squeezing. Measure the neck just below the Adam’s apple, the waist at the navel for men or at the narrowest point for women, and the hips at their widest. The US Navy formula is usually within about 3–4 percentage points of a DEXA scan. Categories follow the American Council on Exercise ranges.
About the Body Fat Calculator
The Body Fat Calculator estimates your body fat percentage with the US Navy tape-measure method, using height, neck and waist measurements — plus hips for women — in centimetres or inches. It shows your category from essential fat to obese on a colour scale and, if you add your weight, splits it into fat mass and lean mass.
How to use the Body Fat Calculator
- Choose your sex and units.
- Enter your height and neck measurement.
- Measure your waist, and your hips if you are a woman.
- Read your body fat percentage and category, and add your weight to see fat and lean mass.
Frequently asked questions
What is a healthy body fat percentage?
According to the American Council on Exercise, roughly 14–24% is a fit-to-average range for men and 21–31% for women.
How accurate is the US Navy method?
It is usually within about 3–4 percentage points of a DEXA scan when measurements are taken carefully.
Where should I measure my waist?
Men measure at the navel; women measure at the narrowest point of the waist. Keep the tape snug but not tight.