Body Fat Percentage Calculator
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Estimate your body fat percentage using the U.S. Navy method. Just measure your neck, waist, and hips.
Body Fat Percentage Calculator
Body Fat %
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About This Tool
The U.S. Navy Body Fat Method
This is one of the most accessible body-fat estimation methods, requiring only a tape measure. It uses circumference measurements at key body sites and was developed for the U.S. Navy as a quick screening tool.How to Measure Correctly
- Neck: Below the larynx, with the tape sloping slightly downward.
- Waist: At the navel level for men; at the narrowest point for women.
- Hips: At the widest point (women only).
Body-Fat Categories
Men: Athletes 6–13%, Fit 14–17%, Average 18–24%, Obese 25%+ Women: Athletes 14–20%, Fit 21–24%, Average 25–31%, Obese 32%+Frequently Asked Questions
How accurate is the Navy method?
It's accurate within about 3–4% body fat for most people compared to DEXA scans — better than BMI and good enough to track progress over time. For competitive athletes or medical use, get a DEXA, BodPod, or hydrostatic measurement.
Should I measure in the morning or evening?
Morning, before eating or drinking, with an empty bladder. This gives the most consistent baseline so you can track changes accurately.
What body fat % is healthy?
For long-term health, men typically aim for 10–20%, women for 18–28%. Lower than the essential-fat category (3% men, 12% women) is dangerous and not sustainable.