Body Fat Calculator
Estimate body fat percentage from a few body measurements (US Navy method).
How this works
This uses the US Navy circumference method, which estimates body fat from your waist, neck, and (for women) hip measurements relative to your height. It's a widely-used field estimate, not as precise as a DEXA scan or body-fat caliper test, but doesn't require any special equipment -- just a tape measure. Measure waist at the navel and neck just below the larynx for the most consistent results.