Body Fat Calculator

This body fat calculator gives an educational estimate of body fat percentage from body measurements. Methods such as the U.S. Navy formula use measurements like height, neck, waist and, for women, hip, and it differs between a body fat calculator for men and a body fat calculator female because the formulas use different inputs. Use it to see a rough starting point and to track change over time with consistent measuring. An estimate from tape measurements is not as precise as a caliper, a DEXA scan or other clinical methods, and results can be off by several percentage points depending on body shape and how carefully you measure. This is an educational estimate, not medical advice. It cannot diagnose anything or judge your health on its own. Talk to a doctor or other qualified clinician before making diet, training or health decisions based on the result. The calculation runs in your browser, nothing is uploaded, no account is needed, and it works offline once loaded.