Body fat calculator (US Navy method)
Measure with a tape: neck below the larynx, waist at the navel (men) or narrowest point (women), hip at the widest point. Values in cm.
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How to use it
- Choose sex and enter height.
- Measure neck and waist (women also hip) in cm.
- Read the estimated body fat and category.
Last checked: October 2026 · Based on: US Navy formula (Hodgdon & Beckett, Naval Health Research Center 1984); categories: American Council on Exercise (ACE). Found a mistake? Use the form below – we fix confirmed errors and update the date.
Frequently asked questions
How accurate is the US Navy method?
It is a rough estimate with an error of a few percentage points – good for tracking changes over time with the same measuring method.
What is a normal body fat percentage?
According to ACE, about 18–24 % for men and 25–31 % for women counts as average.