Estimate body-fat percentage, fat mass, and lean mass using U.S. Navy circumference equations.
The U.S. Navy method estimates body-fat percentage from your height, neck, and waist (plus hip for women) — a solid no-equipment estimate when measured carefully.
The U.S. Navy method uses height, neck, waist, and hip measurements. Tape placement and measurement consistency strongly affect results.
Keep your inputs consistent and compare weekly trends. Make small changes only after enough data accumulates.
Calculator results are estimates. Pregnancy, eating disorders, medical conditions, injuries, or concerning symptoms require qualified professional guidance.
The U.S. Navy tape method uses neck, waist, and (for women) hip circumference plus height. Measure each site three times and average for consistency.
It's a useful estimate, typically within a few percentage points, but it's sensitive to tape placement. Track the trend rather than treating it as a DEXA-level number.
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