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Army Body Fat Calculator

Calculate body fat using the US Army tape measurement method.

Last updated: June 13, 2026

Calculator

inches
inches
inches

Results

Body Fat Percentage17.5%

Fit

CategoryFit
MethodUS Army Tape Test (DoD)

How to Use This Calculator

  1. 1Select your gender.
  2. 2Measure and enter your waist at the navel.
  3. 3Measure and enter your neck circumference.
  4. 4Enter your height.
  5. 5Women: also measure hip circumference.

Formula Explanation

The US Army uses the circumference-based tape test method per AR 600-9 to estimate body fat percentage from neck, waist, and hip measurements.

Male: BF% = 86.010 x log10(waist - neck) - 70.041 x log10(height) + 36.76 Female: BF% = 163.205 x log10(waist + hip - neck) - 97.684 x log10(height) - 78.387

Variables:

WaistCircumference at navel level
NeckBelow the Adam's apple
HipWidest point (women only)
HeightStanding height in inches

Worked Examples

Male: 34" waist, 15" neck, 70" height

  1. 1. BF = 86.010 x log10(34-15) - 70.041 x log10(70) + 36.76
  2. 2. = 86.010 x 1.279 - 70.041 x 1.845 + 36.76
  3. 3. = 17.2%
Result: 17.2% body fat - within Army standards

Why Use This Calculator

  • Official DoD calculation method.
  • No special equipment needed beyond a tape measure.
  • Used for military fitness assessments.
  • Track body composition changes over time.
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Tips & Best Practices

  • Measure at the same time of day (morning is most consistent).
  • Pull the tape snug but not tight.
  • Take 3 measurements and average them for accuracy.
  • Army max body fat standards: Men 18-20 = 20%, 21-27 = 22%, 28-39 = 24%, 40+ = 26%.

Common Mistakes to Avoid

❌ Measuring at the wrong anatomical landmarks.

✅ Waist: at the navel (not the narrowest point). Neck: just below the larynx. Hip (women): widest point of the buttocks.

❌ Pulling the tape too tight or too loose.

✅ The tape should be snug and level, touching skin all around without compressing tissue.

Frequently Asked Questions

How accurate is the Army tape test?
The tape test is accurate to within about 3-4% of DEXA scan results for most people. It is less accurate for very muscular or very lean individuals.
What are the Army body fat standards?
Maximum allowable body fat varies by age. For men: 20% (17-20), 22% (21-27), 24% (28-39), 26% (40+). For women: 30% (17-20), 32% (21-27), 34% (28-39), 36% (40+).
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