Body Fat Calculator
Free online body fat calculator — estimate your body fat percentage using the U.S. Navy method. Supports both male and female measurements.
How This Calculator Works
This calculator uses the U.S. Navy method, which estimates body fat percentage based on body measurements. It's a simple, non-invasive method used by the U.S. Navy to assess body composition.
Formulas
Men: %BF = 495 / (1.0324 − 0.19077 × log₁₀(waist − neck) + 0.15456 × log₁₀(height)) − 450
Women: %BF = 495 / (1.29579 − 0.35004 × log₁₀(waist + hip − neck) + 0.22100 × log₁₀(height)) − 450
Body Fat Categories (Men)
| Category | Range |
|---|---|
| Essential Fat | 2-5% |
| Athletes | 6-13% |
| Fitness | 14-17% |
| Average | 18-24% |
| Obese | 25%+ |
Body Fat Categories (Women)
| Category | Range |
|---|---|
| Essential Fat | 10-13% |
| Athletes | 14-20% |
| Fitness | 21-24% |
| Average | 25-31% |
| Obese | 32%+ |