Body fat calculator
Estimate your body-fat percentage with the U.S. Navy method. Enter your height and a few tape measurements, and see your body-fat percent, category, and fat and lean mass.
U.S. Navy circumference method. It is a solid estimate, not a lab measurement like a DEXA scan, so use it to track change over time.
How the Navy method estimates body fat
The U.S. Navy method estimates body fat from the ratio of your circumference measurements to your height. Because fat tends to sit at the waist and hips, those girths, set against your neck and height, predict body-fat percentage surprisingly well without calipers or a scan.
It is an estimate, so the real value is in tracking it. Measure the same way each time and watch the trend rather than fixating on a single reading. Add your weight and the calculator splits it into fat mass and lean mass.