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Enter Your Measurements
Measure just below Adam's apple
Measure at navel level
Measure at widest part of hips/buttocks
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Your Body Fat Results
Enter your measurements
Fill in your gender, height, neck, waist, and hip (for females) measurements, then click "Calculate".
Understanding Body Fat Percentage
Body fat percentage is the proportion of fat to total body weight. Unlike BMI, which only considers height and weight, body fat percentage gives a more accurate picture of fitness and health. The US Navy method uses circumference measurements to estimate body fat with high accuracy, comparable to more expensive methods like hydrostatic weighing.
How to Measure Correctly
- Neck: Measure just below the Adam's apple (larynx) with the tape sloping slightly downward to the front.
- Waist: For men, measure at the navel level. For women, measure at the smallest point above the navel.
- Hips (women only): Measure at the widest part of the hips and buttocks.
Body Fat Categories
Essential Fat
Men: 2-5% | Women: 10-13% (minimum for health)
Athletes
Men: 6-13% | Women: 14-20%
Fitness
Men: 14-17% | Women: 21-24%
Average
Men: 18-24% | Women: 25-31%
Obese
Men: 25%+ | Women: 32%+
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Frequently Asked Questions
How accurate is the US Navy body fat method?
The US Navy method has a margin of error of about ±3-4% compared to hydrostatic weighing, making it one of the most accurate at-home methods when measurements are taken correctly.
Do I need to measure my hips if I'm male?
No, the formula for males only uses neck and waist measurements. Hips are only required for females.
Why do I need to enter height?
Height is used in the formula to account for body frame size, improving accuracy of the estimate.
Is this calculator free?
Yes, this body fat calculator is completely free to use. We support the tool through advertisements, so please consider allowing ads if you find it useful.
How often should I measure my body fat?
For tracking progress, measure every 2-4 weeks under similar conditions (same time of day, after bathroom, before eating).