💪 Health & Fitness

Body Fat Calculator

Calculate your body fat percentage using the US Navy method. Enter waist, neck and height measurements. Metric and imperial. Includes body fat category scale.

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Body Fat Calculator
US Navy Method
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Enter your measurements to calculate body fat percentage.

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Body Fat Questions
What is a healthy body fat percentage?+
Healthy ranges differ by sex and age. For men: essential fat 2-5%, athletes 6-13%, fit 14-17%, average 18-24%, obese 25%+. For women: essential fat 10-13%, athletes 14-20%, fit 21-24%, average 25-31%, obese 32%+. Women naturally carry more fat due to hormonal, reproductive and thermoregulatory needs.
How accurate is the US Navy body fat method?+
The US Navy method is accurate within 3-4% of DEXA scan results for most people. It uses circumference measurements to estimate body fat without expensive equipment. The most accurate methods are DEXA scan (gold standard), hydrostatic weighing, and Bod Pod. Bioelectrical impedance (BIA) scales are convenient but can vary by 4-8% depending on hydration. The Navy method is reliable enough for tracking progress over time.
How do I measure waist and neck correctly?+
Waist: measure horizontally at the navel (belly button level), not the narrowest point. Stand relaxed, exhale normally, do not suck in. Neck: measure just below the larynx (Adam's apple) at the narrowest point. Hips (women only): measure at the widest point around the buttocks. All measurements should be taken in the morning before eating for best consistency.