Body Fat Calculator (US Navy Method)
Estimate your body fat percentage using the US Navy method.
Calculates fat mass, lean mass, and body fat category.
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Body Fat Estimate
The US Navy Body Fat Formula estimates body fat percentage from simple body measurements.
For Males:
Body Fat % = 86.010 × log10(waist - neck) - 70.041 × log10(height) + 36.76
For Females:
Body Fat % = 163.205 × log10(waist + hip - neck) - 97.684 × log10(height) - 78.387
Body Fat Categories (Men / Women):
- Essential fat: 2–5% / 10–13%
- Athletes: 6–13% / 14–20%
- Fitness: 14–17% / 21–24%
- Average: 18–24% / 25–31%
- Obese: 25%+ / 32%+
Fat Mass = Body Weight × (Body Fat % / 100)
Lean Mass = Body Weight - Fat Mass
Note: This is an estimate. For precise measurements, consider DEXA scans or hydrostatic weighing.