Circumference Bodyfat Calculator
This calculator estimates body fat percentage using circumference measurements such as waist, neck, and hips (for women), along with height. It’s based on the U.S. Navy method and offers a practical alternative when skinfold calipers aren’t available.
Body Fat Calculator Using Circumference Method
U.S. Navy Body Fat Estimation Formula
$$\text{Men BF \%} = 86.010 \cdot \log_{10}(WC – NC) – 70.041 \cdot \log_{10}(H) + 36.76$$
$$\text{Women BF \%} = 163.205 \cdot \log_{10}(WC + HC – NC) – 97.684 \cdot \log_{10}(H) – 78.387$$
Where:
- $$WC$$ = Waist Circumference (cm)
- $$HC$$ = Hip Circumference (cm) (women only)
- $$NC$$ = Neck Circumference (cm)
- $$H$$ = Height (cm)
The U.S. Navy circumference method offers a non-invasive way to estimate body fat by using a measuring tape. It is especially useful for tracking progress over time or when scales and calipers are not available.
- Men typically measure waist and neck.
- Women include hip measurements.
The calculator returns estimated body fat % and lean body mass.