Body Fat Calculator — The U.S. Navy method estimates body fat percentage from a few circumference measurements — height, neck, waist, and (for women) hip. It correlates reasonably well with DEXA scans for most adults and only needs a tape measure.
All measurements stay in your browser.
Estimates use the U.S. Navy method and are approximations, not medical measurements or advice. Body composition varies widely — for accurate readings, consult a healthcare or fitness professional.
Was Body Fat Calculator useful?
O que é Body Fat Calculator?
The U.S. Navy method estimates body fat percentage from a few circumference measurements — height, neck, waist, and (for women) hip. It correlates reasonably well with DEXA scans for most adults and only needs a tape measure.
Enter your measurements in inches, your weight in pounds, and the calculator returns your body fat percentage, the category, the equivalent fat mass, and the equivalent lean mass.
Como usar
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Pick your sex
The formula differs for men and women.
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Measure
Neck (just below the larynx), waist (at the navel for men, narrowest point for women), hip (women, widest point).
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Read the result
See your body fat %, the category, fat mass, and lean mass.
Exemplos
Male, 5'10", 170 lb, neck 15", waist 34"
Typical office worker, light training.
Resultado: ~19% body fat, fitness category
Female, 5'6", 140 lb, neck 13", waist 28", hip 36"
Active adult.
Resultado: ~24% body fat, fitness category
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Last reviewed: 2026-09-25