বডি ফ্যাট ক্যালকুলেটর (US Navy টেপ পদ্ধতি)

The US Navy method estimates body fat from neck, waist and, for women, hip measurements with height.

It is usually within 3-4 percentage points of a DEXA scan; the trend over months matters more than any one number.

Fat-free mass index is lean mass relative to height. Around 25 is the natural ceiling for most men.