Body Fat Calculator

What is body fat percentage?

Body fat percentage is the share of your total weight that is fat, as opposed to muscle, bone, organs and water. It is often a more useful health indicator than weight or BMI alone, because two people at the same weight can have very different amounts of fat and muscle.

How this calculator estimates it

This tool uses the U.S. Navy method, which estimates body fat from simple tape measurements — the neck and waist for everyone, plus the hips for women — combined with your height. These circumferences correlate well with overall fat, giving a reasonable estimate without special equipment.

How to use this calculator

Select your sex, then enter your height and the requested measurements in centimetres, measuring snugly but without compressing the skin. Press Calculate to see your estimated body fat percentage and the category it falls into.

Interpreting the result

General healthy ranges are roughly 10–20% for men and 18–28% for women, though these vary with age and fitness. The tape method is a convenient at-home estimate, not a clinical measurement — for precise assessment use methods like DEXA or consult a health professional.