Body Fat Calculator
Estimate body fat percentage using the US Navy circumference method.
Inputs
Result
Body fat (estimate)
16.9%
Visual breakdown
EssentialAthleteFitnessAverageHigh
Your value: 16.9%
Formula
Male: 495 / (1.0324 − 0.19077·log₁₀(waist−neck) + 0.15456·log₁₀(height)) − 450. Female: uses waist+hip−neck and different coefficients.
Example
Male, 180cm, neck 38cm, waist 86cm ≈ ~17% body fat.
Frequently asked
How accurate is the Navy method?
Within ~3–4% for most people. DEXA and underwater weighing are more precise but harder to access.
Where do I measure?
Neck just below the larynx, waist at the navel (men) or narrowest point (women), hips at widest.
Why does sex matter?
Healthy fat ranges and the formula coefficients differ between men and women.
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This calculator is for general information only and is not medical advice.