Body Fat Percentage Calculator
Estimate your body fat percentage using the U.S. Navy Method with simple body measurements.
Body Fat Percentage
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Category
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Estimated using the U.S. Navy Method. For greater accuracy, consider a DEXA scan or hydrostatic weighing.
About this calculator
This calculator estimates your body fat percentage using the U.S. Navy Method, which uses circumference measurements of your neck, waist, and (for women) hips along with your height. While not as precise as DEXA scans or hydrostatic weighing, the Navy Method provides a reasonably accurate estimate that is free and can be done at home with just a tape measure. Research published in the British Journal of Nutrition found it to be within 3-4% of more expensive methods for most people. Body fat percentage is a far more useful metric than BMI for tracking progress, since BMI does not differentiate between muscle and fat. Tracking your body fat over time gives you a clearer picture of whether you are losing fat, gaining muscle, or both.
Frequently asked questions
How accurate is the Navy Method for body fat?
The U.S. Navy Method typically estimates body fat within 3-4% of DEXA results. It is most accurate for people in the 10-35% body fat range. At very low or very high body fat levels, accuracy decreases. For best results, measure at the same time of day under consistent conditions.
What body fat percentage is considered healthy?
For men, 10-20% is generally considered a healthy athletic range, with essential fat at around 3-5%. For women, 18-28% is typical for a fit physique, with essential fat at 10-13%. Health risks increase above 25% for men and 32% for women.
How do I measure correctly for the Navy Method?
Use a flexible tape measure pulled snug but not compressing the skin. Measure your waist at the narrowest point (usually at the navel), your neck just below the larynx, and (for women) your hips at the widest point. Take each measurement twice and average them.
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