Estimate your body fat percentage using the U.S. Navy circumference method. Get your fat mass, lean mass, and fitness category.
Acceptable
| Body Fat % | 24.0% |
| Category | Acceptable |
| Fat Mass | 42.0 lbs |
| Lean Mass | 133.0 lbs |
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Men: 86.010 × log₁₀(waist − neck) − 70.041 × log₁₀(height) + 36.76
Women: 163.205 × log₁₀(waist + hip − neck) − 97.684 × log₁₀(height) − 78.387
Men: 6–17% (athletes), 18–24% (acceptable), 25%+ (obese). Women: 14–20% (athletes), 21–31% (acceptable), 32%+ (obese).
Uses waist, neck, and hip (women) circumferences with height. Accurate to within 3-4% of DEXA scans.
DEXA scan is the gold standard (±1-2%). Hydrostatic weighing, Bod Pod, then skinfold calipers and Navy method.
Lean mass = total weight minus fat mass. Includes muscle, bone, organs, and water.
Calorie deficit plus resistance training. Aim for 0.5–1% body fat loss per month to preserve muscle.
Calculations are for educational purposes only. Consult a qualified financial advisor for personalized advice.