📊 Body Fat % Estimator
Estimate your body fat percentage with the U.S. Navy tape-measure method.
Measure just below the larynx (Adam's apple).
Men: at the navel. Women: at the narrowest point.
Your Body Fat %
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The U.S. Navy method, explained
The Navy circumference method estimates body fat from a few tape-measure readings rather than skinfold calipers or a lab scan. It works because fat tends to distribute in predictable places, so the relationship between your waist, neck, height (and hip, for women) correlates with overall body-fat percentage. For men it uses neck and waist; for women it adds the hip measurement, which is why this calculator shows a hip field only when you select female.
Measuring accurately
Use a flexible tape, keep it level, and don't pull it tight enough to compress the skin. Measure relaxed — don't suck in your stomach. Because small differences in technique shift the result, the method is most useful for tracking change over weeks and months: measure the same way each time. It pairs naturally with the BMI calculator (which can't see composition) and the TDEE calculator for setting calories to shift your body fat in either direction.