Body Fat Percentage Calculator — Free & Instant
The Body Fat Percentage Calculator estimates your body fat using the U.S. Navy circumference method — one of the most practical and widely used approaches that doesn't require special equipment. Unlike BMI, body fat percentage directly measures how much of your body weight is fat versus lean mass (muscle, bones, organs, water). Knowing your body fat percentage gives you a clearer picture of your fitness level and health risks. Simply enter a few body measurements and get an instant estimate.
How to Use This Calculator
- 1
Select your sex.
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Enter your height in cm.
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Measure and enter your waist circumference at the narrowest point.
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Measure and enter your neck circumference.
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Women: also measure and enter your hip circumference.
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Click Calculate to see your body fat percentage.
Frequently Asked Questions
Measure your waist at the narrowest point (usually just above the belly button for men, at the narrowest point for women). Keep the tape snug but not tight, and measure after exhaling normally.