Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method.
Result
Results are estimates for general information only and are not professional advice.
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.
Frequently Asked Questions
What is the Body Fat Calculator?
Estimate your body fat percentage using the U.S. Navy method. It runs instantly in your browser and is completely free to use.
What do I need to enter to use the Body Fat Calculator?
The Body Fat Calculator asks for the following values (5): Gender, Height (cm), Neck (cm), Waist (cm), Hip (cm, women). Fill them in and the result appears immediately — the calculation runs on your own device, so nothing you type is sent to a server.
How accurate is the Body Fat Calculator?
The Body Fat Calculator uses standard, widely-accepted formulas, so its figures are reliable estimates for everyday planning. They are not a substitute for advice from a qualified professional.
Is the Body Fat Calculator free, and do I need an account?
Yes. The Body Fat Calculator — and every other calculator on Calculatis — is completely free, with no registration, no download and no limit on how often you use it.