Body Fat Calculator
Estimate your body fat percentage using the US Navy circumference method.
Gender
Age
Neck (cm)
Waist (cm)
Height (cm)
Body Fat %
24.3%
Category
Average
Based on US Navy circumference method. For reference only.
US Navy circumference method
Estimates body fat from body circumference measurements. Less accurate than DEXA scanning but practical and equipment-free.
- Men: 86.01×log₁₀(waist−neck) − 70.041×log₁₀(height) + 36.76
- Women: 163.205×log₁₀(waist+hip−neck) − 97.684×log₁₀(height) − 78.387
- Athletic: 6–13% men, 14–20% women
- Average: 18–24% men, 25–31% women
Formula / How it works
Uses the US Navy circumference method. Men: 86.01 × log10(waist−neck) − 70.041 × log10(height) + 36.76 Women: 163.205 × log10(waist+hip−neck) − 97.684 × log10(height) − 78.387