Estimate body fat percentage with the U.S. Navy Body Fat Formula. A practical tool that only needs a tape measure to get a reliable estimate.
Measure just below the Adam's apple
At navel level
Developed by the U.S. Navy to assess recruit body composition. Estimated accuracy is +/-3-4% versus reference methods, and it is usually more useful than BMI for people with more muscle mass.
| Range | Classification | Indicator |
|---|---|---|
| 2-5% | Essential fat | |
| 6-13% | Athlete | |
| 14-17% | Fitness | |
| 18-24% | Acceptable | |
| 25%+ | Obesity |
Ranges based on American Council on Exercise (ACE) guidance and applied body-composition literature. Values vary by age, genetics and training background.
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