By CalculatorInn Team · Updated: 2026-03-22 · Free & accurate · Instant results
Estimate your body fat percentage using the US Navy circumference method. This method uses your neck, waist, and (for women) hip measurements.
Interactive Body Fat Percentage Calculator
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Male: 86.010 × log₁₀(waist − neck) − 70.041 × log₁₀(height) + 36.76
The US Navy method uses circumference measurements to estimate body fat. Female formula also includes hip measurement.
The Navy method is within 1-3% of hydrostatic weighing for most people. It's less accurate for very muscular or very lean individuals.
For men: 10-20% is fit, 14-17% is ideal. For women: 18-28% is fit, 21-24% is ideal.
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