Army Body Fat Calculator
Height (cm)
Neck (cm)
Waist at navel (cm)
The US Army body fat calculator uses circumference measurements to estimate body fat percentage. It was developed as a field-expedient method that doesn't require specialist equipment. Men measure neck and waist; women measure neck, waist, and hips.
- 1Men: %BF = 86.010 × log₁₀(waist − neck) − 70.041 × log₁₀(height) + 36.76
- 2Women: %BF = 163.205 × log₁₀(waist + hip − neck) − 97.684 × log₁₀(height) − 78.387
- 3All measurements in inches or cm (formulae differ)
- 4Maximum allowable body fat: varies by age and sex (e.g., male age 17–20: max 20%)
Male: height 70", neck 15", waist 32"=~15% body fatWell within Army standards
Male: height 70", neck 15", waist 40"=~25% body fatAbove Army maximum for most ages
| Age Group | Male Max | Female Max |
|---|---|---|
| 17–20 | 20% | 30% |
| 21–27 | 22% | 32% |
| 28–39 | 24% | 34% |
| 40+ | 26% | 36% |
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