Free Army Body Fat Calculator Online
Estimate your body fat percentage using the official U.S. Army circumference method with this free army body fat calculator. Check whether you meet military standards — completely free and online.
Body Fat Percentage
Enter your measurements
Male Army Body Fat Standards
| Age Group | Maximum Body Fat % |
|---|---|
| 17–20 | 20% |
| 21–27 | 22% |
| 28–39 | 24% |
| 40+ | 26% |
Female Army Body Fat Standards
| Age Group | Maximum Body Fat % |
|---|---|
| 17–20 | 30% |
| 21–27 | 32% |
| 28–39 | 34% |
| 40+ | 36% |
How to Take Measurements Correctly
Neck
Measure just below the Adam's apple. Tape should slope slightly downward at the front. Round down to nearest half inch.
Waist (Men)
Measure at the navel level. Stand relaxed, do not suck in your stomach. Round up to nearest half inch.
Waist (Women)
Measure at the natural waist — the narrowest point between ribs and hip bones. Round up to nearest half inch.
Hips (Women)
Measure at the widest point of the buttocks. Keep the tape level. Round up to nearest half inch.
Army Body Fat Formula Explained
The army body fat calculator uses the Department of Defense circumference method defined in AR 600-9. For men, the formula is: 86.010 × log10(waist − neck) − 70.041 × log10(height) + 36.76. For women, it is: 163.205 × log10(waist + hip − neck) − 97.684 × log10(height) − 78.387. All measurements are in inches. The formula was validated against hydrostatic weighing and correlates reasonably well with DEXA scans, though it has a 3–5% margin of error. This free army body fat calculator applies the same formula used during actual Army body composition assessments. Use it online anytime to track your progress.
Frequently Asked Questions
Disclaimer: This free online army body fat calculator provides estimates using the AR 600-9 circumference method. It has a 3–5% margin of error. For official military assessments, measurements must be taken by trained personnel. This tool is for informational purposes only.
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