Army Body Fat Calculator — AR 600-9 Tape Test
Compute body fat percentage with the official U.S. Army tape test formula (AR 600-9), complete with passing standards per age group. Supports centimeter (cm) and inch inputs.
Calculator
Official AR 600-9 formula
Female: %BF = 163.205 × log₁₀(waist + hip − neck) − 97.684 × log₁₀(height) − 78.387
all in inches; cm input converted automatically (÷ 2.54)
Official protocol note: each circumference measured to the nearest 0.5 inch; body fat % rounded to nearest whole number in official assessments. This calculator shows precise values (2 decimals) so you can see your position relative to the cutoff.
Army passing standards (maximum body fat %)
| Age group | Male | Female |
|---|---|---|
| 17–20 | 20% | 30% |
| 21–27 | 22% | 32% |
| 28–39 | 24% | 34% |
| 40+ | 26% | 36% |
Exceeding the limit = fails Army Body Composition Program standards (formerly AWCP).
How to measure (tape test)
- Neck — just below Adam's apple, tape perpendicular to neck axis.
- Abdomen (male) — horizontal at navel, minimal breathing, arms at sides.
- Waist (female) — natural waistline (narrowest point).
- Hips (female) — largest buttock protrusion, feet together.
- Height — no footwear, standing straight.
Scope limits (scope boundary)
This tool is NOT a general body fat calculator. Our general body fat calculator (body-fat-calculator) uses the Navy method / general fitness estimation for anyone wanting a body composition estimate.
This tool uses the U.S. Army-specific AR 600-9 tape method — formula, measurement points, and per-age-group passing thresholds set by U.S. military regulation. Results are only meaningful in the Army standards context, not as general health benchmarks.
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FAQ
What is the official Army tape test formula (AR 600-9)?
For men: %BF = 86.010 × log10(abdomen − neck) − 70.041 × log10(height) + 36.76. For women: %BF = 163.205 × log10(waist + hip − neck) − 97.684 × log10(height) − 78.387. All measurements in inches. Circumferences are measured to the nearest 0.5 inch and body fat percentage is rounded to the nearest whole number in official assessments.
What are the Army body fat passing standards by age?
Army maximum body fat percentages: men 17–20 years 20%, 21–27 years 22%, 28–39 years 24%, 40+ years 26%; women 17–20 years 30%, 21–27 years 32%, 28–39 years 34%, 40+ years 36%. Exceeding the limit means failing Army Body Composition Program standards.
Where are the Army tape test measurement points?
Men: neck (below Adam's apple, tape perpendicular to neck axis) and abdomen (at navel, minimal breathing, arms at sides). Women: neck (same), waist (natural waistline), and hips (largest buttock protrusion). Height is also measured.
Is this calculator an official Army assessment?
No. This is an educational tool for estimating AR 600-9 tape test results. Official assessments are only conducted by units with trained personnel using official measurement procedures.
How does it differ from the general (Navy) body fat calculator?
The general/Navy body fat calculator uses the U.S. Navy tape test formula for general fitness estimation, while this tool uses the U.S. Army-specific (AR 600-9) formula and passing standards with per-military-age-group thresholds. For general fitness estimation, use the general body fat calculator; for Army standards readiness, use this calculator.
What is the 2023 one-site method (Army Directive 2023-11)?
Since June 2023, the Army authorizes a simpler one-site method developed by USARIEM: measure only the abdominal circumference at the navel plus body weight. Male: %BF = -26.97 - (0.12 x weight in lb) + (1.99 x abdomen in inches). Female: %BF = -9.15 - (0.015 x weight in lb) + (1.27 x abdomen in inches). Results round to the nearest whole percent.
What are the AR 40-501 joining standards vs AR 600-9 retention standards?
AR 40-501 sets higher body fat limits for joining the Army (men 24/26/28/30%, women 30/32/34/36% by age group) than the AR 600-9 retention standards (men 20/22/24/26%, women 30/32/34/36%). New soldiers are expected to reach retention standards after joining.
How accurate is the Army tape test?
The Army tape test has a standard error of about 3-4% compared to DEXA or hydrostatic weighing. It may overestimate body fat in very muscular individuals and underestimate in those with low muscle mass. It is a field-expedient screening tool, not a clinical measurement.
What happens if I fail the Army body fat tape test?
Failing the tape test may lead to enrollment in the Army Body Composition Program (ABCP), which includes counseling, a weight management plan, and monthly progress checks. Continued failure can affect promotions, assignments, and retention.
Can I use metric units (cm and kg)?
Yes. This calculator accepts centimeters and kilograms and converts them automatically (1 inch = 2.54 cm, 1 lb = 0.4536 kg). Official Army measurements use inches and pounds.
How should measurements be taken for best accuracy?
Use a cloth tape (not metal), pulled snug without compressing skin. Take three consecutive measurements at each site and average them. Official protocol rounds each measurement to the nearest 0.5 inch before applying the formula.
Does this calculator give medical advice?
No. This is an educational estimate only, not medical advice or an official Army assessment. Body composition affects health in complex ways; consult a healthcare professional or registered dietitian for personal guidance.
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