Body Fat Calculator (US Navy tape method)
Measure your waist, neck (and hips for women) with a tape measure to estimate your body fat percentage.
For general information only, not medical advice. Speak to your GP, midwife or a health professional about your own health.
How it works
The US Navy method estimates body fat from body measurements and height, using logarithmic formulas developed by the US military.
Measure your neck just below the larynx, your waist at the navel (men) or narrowest point (women), and hips at the widest point.
Expect accuracy within a few percent; DEXA scans are more precise.
Frequently asked questions
What's a healthy body fat percentage?+
Roughly 10β20% for men and 18β28% for women, depending on age and fitness.