Free Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method based on body measurements.
inches
inches
inches
Body Fat Percentage
17.5 %
Lean Mass Percentage82.5 %
Body Fat Percentage vs Waist Circumference
U.S. Navy Body Fat Formula (Male)
Body Fat % = 86.010 x log10(waist - neck) - 70.041 x log10(height) + 36.76
All measurements are in inches.
Body Fat Categories (Male)
Example Calculation
A male with a 34-inch waist, 15-inch neck, and 70 inches tall.
- 01Waist - Neck = 34 - 15 = 19 inches
- 02log10(19) = 1.2788
- 03log10(70) = 1.8451
- 04Body Fat = 86.010 x 1.2788 - 70.041 x 1.8451 + 36.76
- 05= 110.0 - 129.2 + 36.76 = 17.5%
Frequently Asked Questions
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