body fat calculator
estimate body fat percentage with the US navy method using a tape measure for neck, waist and, for women, hips.
runs on your device · free · no sign-up
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frequently asked questions
how does the us navy method work?
it uses the logarithm of circumference measurements and height. men use waist minus neck; women use waist plus hip minus neck.
how do i measure correctly?
measure the neck below the larynx, the waist at the navel (men) or narrowest point (women), and hips at the widest point, relaxed and not pulling the tape tight.
how accurate is it?
it is an estimate that can be off by several percentage points. it is not a medical measurement.