Body Fat Calculator
Estimate your body fat percentage with the US Navy method: simple tape measurements, instant results, no machines needed.
About this tool
Estimate your body fat percentage at home with the US Navy method — height, neck, waist (and hips for women) convert into a reliable estimate with standard formulas.
Body fat matters more than weight: two people at 70 kg can look totally different. Track the number monthly with a tape measure to see real body-composition progress.
FAQ
How accurate is the Navy method?
It is the most accurate tape-measure equation, typically within about 3% of DEXA results for most people, less for very muscular or very heavy builds.
How do I measure my waist?
At the navel, relaxed, after exhaling. Neck: just below the larynx, straight. Hips (female): at the widest point.
What body fat should I target?
Healthy ranges are roughly 10-20% for men and 20-30% for women. Below 5% (men) or 12% (women) risks health issues.