📏 Body Fat Calculator

Body Fat Percentage Calculator (US Navy Method)

Estimate your body fat percentage using the US Navy formula. This method uses simple body measurements — neck, waist, and hip circumference — to calculate body fat without expensive equipment.

Results are categorized into fitness levels: essential fat, athlete, fitness, average, and obese. The formula differs for men and women to account for different fat distribution patterns.

How accurate is the US Navy body fat formula?

The US Navy method is accurate within 1-3% for most people when measurements are taken correctly. It correlates well with hydrostatic weighing and DEXA scans.

Where should I measure my waist and neck?

Measure your waist at the navel level and neck just below the larynx. For women, measure hips at the widest point. Use a flexible tape measure and don't compress the skin.