Army Body Fat Calculator
AR 600-9 Circumference (Tape Test) Method
Enter your measurements to estimate body fat percentage using the Army's official tape-test formula.
Parameters
Estimated Body Fat
Understanding the Army Body Fat Standard
The U.S. Army uses a circumference-based ("tape test") formula under Army Regulation 600-9 as a low-cost field alternative to more precise methods like DEXA. It's distinct from the general-purpose Navy method used in our standard Body Fat Calculator — this tool applies the Army's specific formula and compares your result against official maximum-allowable percentages by age band.
Neck & Waist (Men)
For men, the formula uses neck and waist circumference along with height — no hip measurement is required.
Neck, Waist & Hip (Women)
For women, the formula additionally requires hip circumference, reflecting different typical fat distribution patterns.
Age-Banded Standards
Army maximum-allowable body fat percentages increase with age band, recognizing natural changes in body composition over a career.
Estimate Only
This tool approximates the tape-test method — it is not a substitute for an official, trained-assessor measurement.
The AR 600-9 Formula
Men
Women
All measurements are in inches. Metric inputs are converted to inches internally before the formula is applied.
Army Maximum Allowable Body Fat %
| Age Band | Male Max | Female Max |
|---|---|---|
| 17-20 | 20% | 30% |
| 21-27 | 22% | 32% |
| 28-39 | 24% | 34% |
| 40+ | 26% | 36% |
Important Limitations
- Measurement sensitivity: Small errors in tape placement can meaningfully shift the result — official assessments use trained, standardized technique.
- Not a medical or diagnostic tool: This estimates the same circumference-based value used for military standards compliance, not clinical body composition.
- Different from the Navy method: Our standard Body Fat Calculator uses a different (though related) circumference formula — the two won't produce identical numbers.
Key Takeaways
- This is the official Army tape-test formula. It's distinct from the general Navy method used elsewhere on this site.
- Measurement technique matters. Consistent, correctly placed tape measurements are essential for an accurate estimate.
- Standards scale with age. The maximum-allowable percentage rises in each age band to reflect typical body composition changes.
- Consult a professional. This tool approximates the official Army tape-test method; only a certified Army body composition assessment counts for official standards compliance.