Estimate body fat percentage from circumference measurements with the US Navy method.
The US Navy method uses logarithmic relationships between height, waist, neck and—for women—hip circumference.
Use consistent circumference measurements to track a rough body-composition trend over time. Measure at the same time of day and keep the tape level without compressing the skin.
A man who is 175 cm tall with an 82 cm waist and 37 cm neck receives an estimate based on the logarithmic US Navy circumference formula.
It is a convenient estimate, but hydration, tape position and body shape can affect it.
Use the narrowest practical neck point and the abdomen at the navel; follow one consistent protocol.
Yes. The calculator converts imperial inputs before applying the formula.
