Body Fat Calculator (US Navy)
The US Navy method estimates body fat from tape measurements. It is more specific than BMI but still an estimate. Measure in the morning, tape snug but not tight, and be consistent.
Estimated body fat15.7%
Estimate only. Not a clinical body-composition test.
Formula
Uses the US Navy log10 circumference formula. Males: waist and neck. Females: waist, hip, and neck.
How to use this calculator
- Select sex.
- Measure height, neck, and waist (and hips for females) in centimeters.
- Read the estimated percentage.
Examples
Male tape test
A 178 cm male with 38 cm neck and 84 cm waist typically lands in a fitness body-fat range with this method.
FAQ
Why is hip required for females?+
The Navy female formula includes hip circumference to better capture body-shape differences.
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