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Body Fat % Calculator

Estimate your body fat percentage using simple body measurements — no calipers or scales needed.

Body Fat Percentage

Used to calculate fat mass and lean mass.

Measure below the larynx (Adam's apple), tilting head slightly forward.

Men: measure at navel. Women: measure at narrowest point.

Body Fat Percentage
— %
—
—
Fat mass
—
kg
Lean mass
—
kg

Body fat categories

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How is body fat % estimated?

This calculator uses the U.S. Navy circumference method, developed by Hodgdon and Beckett (1984). It uses measurements of your neck, waist, and hips (women only) alongside your height to estimate body fat percentage — no equipment beyond a soft tape measure required.

While not as precise as DEXA scanning or hydrostatic weighing, the Navy method is one of the most accurate tape-measure techniques available, with a typical margin of error of ±3–4%.

Body fat percentage is a more meaningful health marker than BMI alone, because it distinguishes between fat mass and lean mass. Two people with the same BMI can have very different body compositions.