Body Fat Percentage Calculator

Why Body Fat Matters More Than Weight

When people say they want to "lose weight," what they actually mean is they want to lose fat. The scale only tells you your total mass—which includes bone, water, organs, and muscle. That is why body fat percentage is a far superior metric to BMI or standard weight.

The U.S. Navy Method utilized in this calculator relies on specific circumference measurements to estimate the lean mass versus fat mass ratio. It has been validated as an accurate tool for populations without requiring expensive DEXA scans.

How to Measure Accurately

• Neck: Measure right below the larynx (Adam's apple) with the tape sloping slightly downward to the front. Do not flex the neck.
• Waist (Men): Measure horizontally around the navel. Keep the stomach completely relaxed.
• Waist (Women): Measure at the narrowest point of the waist, usually halfway between the bottom rib and the hips.
• Hips (Women only): Measure around the widest portion of the hips and buttocks.