Body Fat Calculator
Estimates body fat percentage using the US Navy tape-measure method.
Your result
Estimate only. Results update as you type.
How this calculator works
Men use waist, neck and height. Women also use hip. The formula converts these to body density and then body fat.
Worth knowing
Measure at the same time of day each time, since waist size changes through the day.
Guides for this calculator
- Body Fat Calculator Explained for Australians
- Body Fat Mistakes Australians Make and How to Avoid Them
Questions
- Are these calculators medical advice?
- No. They provide general information. See your GP or visit healthdirect.gov.au for personal advice.
- Do they work for children?
- No. Adult formulas are used throughout. Children’s growth is assessed differently.
- Where do the formulas come from?
- Each calculator page names the formula used, such as Mifflin-St Jeor for BMR or the US Navy method for body fat.
This calculator gives general estimates using published Australian rates and formulas. It doesn’t consider your personal circumstances. Check current figures with the ATO, your state government or a qualified professional before making decisions. See our disclaimer.