About this tool
Estimate your body fat percentage from a few tape-measure circumferences using the US Navy method, and see which body fat category the result falls into. All calculations run locally in your browser.
Frequently asked questions
Which measurements do I need?
Height, neck and waist for everyone, plus the hip measurement for women. Measure at the natural waist and the widest part of the hips for the best estimate.
How accurate is the US Navy method?
It is a quick estimate based on circumferences and is usually within a few percent for most people, though methods like DEXA scans are more precise.