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Body Fat Calculator
Estimate your body fat percentage using the US Navy circumference method.
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Body Fat Calculator
US Navy circumference method
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US Navy Body Fat Formula
The US Navy method estimates body fat percentage using simple circumference measurements. It's more accurate than BMI because it accounts for body shape rather than just height and weight.
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
All measurements in inches
Measurement Tips
- •Waist: Measure at the navel level (men) or narrowest point (women)
- •Neck: Below the larynx (Adam's apple), sloping slightly downward
- •Hip (women): Widest part of the buttocks
- •Take measurements in the morning before eating for best consistency