Estimate your body fat percentage with the US Navy circumference method. Enter your sex, age, height, weight and circumference measurements in metric or imperial.
Choose your unit system, then enter your sex, age, height, weight and circumference measurements (neck, waist, and hip for females). The US Navy method estimates body fat percentage, fat mass and lean body mass.
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The US Navy body fat method estimates body fat percentage from circumference measurements. It's more informative than BMI because it distinguishes fat from lean mass, though it's still an estimate — a DEXA scan is the gold standard.
Measure neck below the larynx, waist at the navel, and hip at the widest point.
It's typically within 3–4% of DEXA for most people. Accuracy depends on careful, consistent measuring — measure at the same spots each time, ideally by the same person.
The female equation includes hip circumference; the male equation does not. The field appears only when 'Female' is selected.