Body Fat Estimator (Navy Method)

Many of these formulas use different constants for men and women, so this can change the result noticeably.

Pick the option that matches your body; it is used only for the calculation.

Your standing height in centimetres. The Navy formula uses height alongside the tape measurements to estimate body fat.

Your body weight in kilograms, used here to convert the fat percentage into fat and lean-mass figures.

The distance around your neck, measured just below the larynx. A thicker neck lowers the estimated fat percentage.

Keep the tape snug but not compressing the skin.

The distance around your waist — for men at the navel, for women at the narrowest point. A larger waist raises the estimate.

Measure at the end of a normal breath, without holding your stomach in.

The distance around your hips at their widest point. The women's formula uses this in addition to neck and waist.