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Body Fat Calculator
Calculate your body fat percentage using height, neck, and waist measurements. Based on the US Navy formula.
Gender
💡 How to Use
Select your gender and enter height (cm), neck circumference (cm), and waist circumference (cm), then click 'Calculate'. Women also enter hip circumference. Based on the US Navy formula, your body fat percentage is displayed with categories: Essential Fat, Athletes, Fitness, Average, and Obese. Only a tape measure is needed — no special equipment required. Track regularly to monitor your fitness progress objectively.
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FAQ
What's the difference between body fat percentage and BMI?▼
BMI uses only height and weight, so it can't distinguish muscle from fat. Body fat percentage estimates your actual fat ratio, giving a more accurate picture of body composition.
How accurate is the US Navy formula?▼
Studies show it's accurate within about ±3–4% compared to DEXA scans. It's very practical for daily tracking since you only need a tape measure — no expensive equipment required.
What is the ideal body fat percentage?▼
According to ACE guidelines, the Fitness range is 14–17% for men and 21–24% for women. Athletes typically aim for 6–13% (men) or 14–20% (women).