0%
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Fat mass
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Lean mass
U.S. Navy circumference (tape) method. Measure relaxed, at the widest/narrowest points as defined by the Navy standard.
Frequently Asked Questions
How does the tape method estimate body fat?
It uses the U.S. Navy formula based on circumference measurements (neck and waist, plus hips for women) and your height. It is quick and needs only a tape measure, with typical accuracy of ±3–4%.
What is a healthy body fat percentage?
General ranges: men — athletes 6–13%, fitness 14–17%, average 18–24%, high 25%+; women — athletes 14–20%, fitness 21–24%, average 25–31%, high 32%+.
Estimate your body fat percentage using the U.S. Navy circumference method with just a tape measure.