Body Fat Calculator

Estimate your body fat percentage using the trusted US Navy circumference method — no calipers or scales required.

What is US Navy method?

Body fat percentage is the proportion of your total body weight that is fat mass, as opposed to muscle, bone, and water. It's a more precise indicator of fitness than weight alone.

This calculator uses the US Navy circumference method, which estimates body fat percentage from neck, waist (and for women, hip) measurements plus height. It was developed by the U.S. Navy as a simple, equipment-free alternative to skinfold calipers or DEXA scans, and is considered reasonably accurate for most body types.