Fitness
Body Fat Calculator
Estimate body-fat percentage with the U.S. Navy method.
Body fat
%
Amortization schedule
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Worked example
The Navy method uses logarithms of circumference and height. Measure waist at the navel, neck just below the larynx, and (for the female formula) hips at the widest point. Keep units consistent with the selected metric/US mode.
FAQ
Is Navy body fat the same as DEXA?
No. Circumference formulas are estimates. DEXA, hydrostatic weighing, and similar methods can differ by several percentage points.
Why is hip circumference required?
The female Navy equation includes hip circumference. The male equation uses abdomen and neck only; unused fields do not enter that formula.
Sources
Assumptions and limitations
These fitness results are not a medical diagnosis or treatment plan. They use the named screening formulas only and cannot replace advice from a qualified clinician.
Tape placement and posture change the result. This is not a clinical body-composition test.
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