Formula-based result
Enter measurements and select Calculate.
U.S. Navy circumference method
Measurements are normalized to inches. The male formula uses height, neck, and waist; the female formula also uses hip circumference. The displayed estimate is derived from the method's body-density equation.
Measurement and limitations
Use a flexible tape consistently without pulling excessively tight. This is not a direct body-composition measurement or diagnosis. Technique and individual variation affect results; it is not intended for children or pregnancy.
Worked example
For the male formula, height 70 inches, neck 15 inches, and waist 34 inches produce a circumference-based estimate using the displayed Navy equation.
Educational adult-use boundary
This calculator is an informational mathematical estimator for adults. It does not diagnose health, recommend treatment, prescribe food intake, define an ideal body, or provide pediatric or pregnancy guidance.