Body fat percentage is the proportion of your total body weight that is fat mass, as opposed to lean mass (muscle, bone, organs, water). It is a more accurate measure of fitness than weight or BMI alone.
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How to Calculate — The U.S. Navy Circumference Method Formula
We use the US Navy circumference method. For men: 86.010×log10(abdomen-neck) - 70.041×log10(height) + 36.76. For women: 163.205×log10(waist+hip-neck) - 97.684×log10(height) - 78.387.
- Use a flexible measuring tape to measure your waist, neck, and (for women) hips.
- Enter your height and gender.
- Ensure the tape is snug but not compressing the skin.
What Does Your Result Mean?
Frequently Asked Questions
How accurate is the US Navy method?
It is generally accurate within 3-4% of DEXA scans for most people, making it an excellent and accessible tracking tool.
What is an ideal body fat percentage?
For men, fitness range is 14-17% and acceptable is 18-24%. For women, fitness range is 21-24% and acceptable is 25-31%.
Can I lose fat in specific areas?
No, spot reduction is a myth. You must lower your overall body fat percentage through a calorie deficit to lose fat in specific areas.
How often should I measure my body fat?
Measuring once every 2-4 weeks is ideal. Daily measurements will fluctuate based on water retention and bloating.
Next Steps
Now that you have your 체지방 계산기 result, use these tools to build a complete picture of your health metrics.
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Evidence-informed calculator · Updated August 2026
This calculator uses the stated published equation (U.S. Navy Circumference Method) and is for educational use. A calculator result is an estimate, not medical advice or an individual clinical assessment.
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