Body Fat Calculator
Estimate your body fat percentage using the US Navy method. Enter your measurements for an accurate estimate.
Measure at navel level
How the US Navy Body Fat Formula Works
Men: Body Fat % = 86.010 x log10(waist - neck) - 70.041 x log10(height) + 36.76
Women: Body Fat % = 163.205 x log10(waist + hip - neck) - 97.684 x log10(height) - 78.387
Body Fat Categories
| Category | Men | Women |
|---|---|---|
| Essential Fat | 2-5% | 10-13% |
| Athletes | 6-13% | 14-20% |
| Fitness | 14-17% | 21-24% |
| Average | 18-24% | 25-31% |
| Obese | >25% | >32% |
Other Methods to Measure Body Fat
- Skinfold calipers: Pinch skin at specific sites, ~3-4% accuracy
- Bioelectrical impedance: Scales send current through body, ~3% error
- DEXA scan: X-ray based, most accurate at ~1-2% error
- Hydrostatic weighing: Gold standard, 1-2% accuracy
Body Fat Results
Estimated Body Fat
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Category
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Fat Mass (lbs)
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Lean Mass (lbs)
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