Body fat percentage calculator (US Navy)

Estimate your body fat percentage with the US Navy method using tape measurements.

Body fat

16.9%

US Navy method (circumference estimate). Measure relaxed, without tightening the tape. Not a substitute for professional assessment.

How the calculation works

The US Navy method uses height and circumferences (neck, waist and, for women, hip) in a logarithmic formula to estimate body fat without a bioimpedance scale.

Frequently asked questions

Do I need the hip measurement?

Only for women. For men, the hip is not used.

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Updated on June 17, 2026 · by Rafael Rossi · Methodology & sources