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Army Body Fat Calculator

Official U.S. Army Body Composition Standards (AR 600-9)

Calculate your body fat percentage using the official U.S. Army formula. This method is used for military fitness assessments and body composition standards.

Standard range: 17-60 years
Measure just below the larynx (Adam's apple)
Measure at the navel (belly button)

Your Results

Enter your measurements to see your Army body fat percentage and category.

Army Body Fat Formula (AR 600-9)

Official Formulas (Metric):

For Males:

BF% = 86.010 × log10(Waist - Neck) - 70.041 × log10(Height) + 36.76

For Females:

BF% = 163.205 × log10(Waist + Hip - Neck) - 97.684 × log10(Height) - 78.387

Note: All measurements must be in centimeters for these specific constants.

How the Army Uses This:

The U.S. Army uses these circumference-based formulas to estimate body fat percentage because they are practical, cost-effective, and reasonably accurate for large-scale assessments. Soldiers who exceed the weight-for-height standards are "taped" using this method to determine if they meet body composition requirements.

Maximum Allowable Body Fat Standards

According to AR 600-9, the maximum allowable body fat percentage varies by age and gender:

Age Group Male Max % Female Max %
17 - 20 20% 30%
21 - 27 22% 32%
28 - 39 24% 34%
40 + 26% 36%

How to Measure Correctly

For Males:
  • Neck: Measure just below the larynx (Adam's apple), with the tape sloping slightly downward to the front.
  • Waist: Measure at the navel (belly button) level, parallel to the floor. Do not suck in your stomach.
For Females:
  • Neck: Same as males, measure just below the larynx.
  • Waist: Measure at the narrowest part of the abdomen (usually above the navel).
  • Hips: Measure at the widest part of the buttocks, parallel to the floor.
Pro Tip: Use a non-stretchable tape measure. Take each measurement three times and use the average for the most accurate result.

Frequently Asked Questions

The "Tape Test" is the common name for the U.S. Army's circumference-based body fat assessment. It is used to determine if a soldier who exceeds the weight-for-height screening table is within the authorized body fat percentage.

While not as accurate as DEXA scans or hydrostatic weighing, the Army formula is generally accurate within 3-4% for most individuals. It tends to be more accurate for people with average body types and may over- or under-estimate for extremely muscular or lean individuals.

In the U.S. Army, soldiers who exceed body fat standards are enrolled in the Army Body Composition Program (ABCP). This involves nutritional counseling, increased physical training, and regular monitoring to help the soldier return to standards.

Yes! The Army formula is a widely recognized method for estimating body fat percentage. It's a great tool for anyone tracking their fitness progress, as it focuses on body composition rather than just total weight.

Measurement Tips

  • Measure on bare skin for accuracy.
  • Keep the tape snug but not tight enough to compress the skin.
  • Stand straight with arms at your sides.
  • Measure at the same time of day (preferably morning).
  • Have someone else take the measurements if possible.
  • Consistency is key for tracking progress.

Important Links

All Health Calculators BMI & Health Status Body Fat Percentage Basal Metabolic Rate Ideal Weight Finder
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Trusted Health Resources:

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Medical Disclaimer

This calculator is for educational and informational purposes only. It uses the U.S. Army's official formula but is not an official military tool. Results are estimates and may vary from official military assessments. Body fat percentage is just one metric of health and fitness. Always consult with a healthcare professional or a certified fitness expert for a comprehensive health assessment.