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Body Fat Calculator

Estimate your body fat percentage using the U.S. Navy tape method.

Units
Gender
cm/in
cm for metric, inches for imperial.
kg/lb
cm/in
cm/in
At the navel.
cm/in
Required for women.
Clear

The U.S. Navy method

This calculator estimates body fat percentage from body circumference measurements using the U.S. Navy formula. Men need height, neck and waist; women also need hip circumference. Measure with a snug (not tight) tape and don't hold your breath.

It's a convenient, no-equipment estimate, but methods like DEXA scans or hydrostatic weighing are more precise. Use it to track trends over time rather than as an exact figure.