Body Fat Calculator
Estimate body fat percentage with a tape measure, using the US Navy circumference method.
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Body fat
- Category (ACE)
- Fat mass
- Lean mass
- Note
- Work
Saved Calculations
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| Name | Calculation | Result | Remove |
|---|
The US Navy Body Fat Formula
Men: %BF = 86.010 log₁₀(waist − neck) − 70.041 log₁₀(height) + 36.76
Women: %BF = 163.205 log₁₀(waist + hip − neck) − 97.684 log₁₀(height) − 78.387
Measurements in inches (Hodgdon and Beckett, Naval Health Research Center, 1984). Measure the neck just below the larynx, the waist at the navel (men) or narrowest point (women), and hips at the widest point.
| Category (ACE) | Women | Men |
|---|---|---|
| Essential fat | 10–13% | 2–5% |
| Athletes | 14–20% | 6–13% |
| Fitness | 21–24% | 14–17% |
| Average | 25–31% | 18–24% |
| Obese | 32%+ | 25%+ |
Worked Example
Tips
Measure three times and average, with the tape snug but not compressing the skin. Results are estimates.