Body Fat Calculator
This tool estimates body fat percentage from circumference measurements. It can be useful when you do not have access to a body composition scale.
How body fat is estimated
This calculator uses the U.S. Navy circumference method. The male formula uses height, neck, and waist. The female formula also uses hip circumference.
Measure with a soft tape, avoid pulling it too tight, and try to measure under similar conditions each time.
Body fat vs BMI
BMI only uses height and weight. Body fat estimation is closer to body composition, but circumference methods are still rough estimates and depend heavily on measurement quality.
This tool is not a medical test and cannot replace DEXA, professional assessment, or clinical advice. Use it as a trend-tracking estimate.