Estimate body fat percentage, lean body mass, and fat mass using the US Navy tape method.
Result
Estimated using official US Navy tape circumference equations. Not a clinical medical diagnosis.
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US Navy Method: Logarithmic circumference ratios (Waist, Neck, Hip, Height)
Male, 175 cm height, 75 kg weight, 85 cm waist, 38 cm neck.
Body Fat: ~17.4% (Fitness / Healthy Range) | Lean Mass: ~61.9 kg | Fat Mass: ~13.1 kg.
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Open calculatorThe US Navy formula is accurate within 1% to 3% for the general population when circumference measurements are taken precisely with a non-elastic tape measure.
For men: Essential fat is 2–5%, Athletes 6–13%, Fitness 14–17%, Acceptable 18–24%, and Obesity >25%. For women: Essential fat is 10–13%, Athletes 14–20%, Fitness 21–24%, Acceptable 25–31%, and Obesity >32%.
Unlike simple BMI (which only accounts for total weight and height), body fat percentage distinguishes between metabolically active lean muscle mass and stored adipose tissue, providing a far more actionable health indicator.