Body Fat Percentage Calculator
Estimate body-fat percentage using the U.S. Navy circumference formula — you only need a measuring tape for the neck, waist and (for women) hips.
Height (cm)
Neck circumference (cm)
Waist circumference (cm)
Body fat
17.8%
Category
Fitness
U.S. Navy circumference method. Measure the waist at the navel (men) or the narrowest point (women), the neck just below the larynx, the hip at the widest point. Accuracy is ±3–4% versus a DEXA scan.
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Free to use, no sign-up. Calculations run in your browser — nothing you type is sent to a server. These tools are for general information only, not professional advice. See the full tool list.