Body Fat Percentage Calculator - Official US Navy Method (2026)
Calculate your body fat percentage using the official US Navy tape measure method. Measure waist, neck, and hips to discover lean mass and fat mass.
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⚙️ Configuration & Inputs
lbs
in
in
in
📊 Results & Analysis
Estimated Body Fat
16.8%
Fitness Category (Healthy Athletic)
| Fat Mass Weight | 30.2 lbs |
| Lean Body Mass | 149.8 lbs |
| Ideal Body Fat Range | 14% - 17% (Men) / 21% - 24% (Women) |
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The Official US Navy Circumference Method
Developed by the Naval Health Research Center, this method correlates tape measurements against hydrostatic weighing without needing underwater submersion or DEXA scans.
Frequently Asked Questions
For men, measure horizontally at the level of the navel. For women, measure at the narrowest point of the natural waistline.