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Army Body Fat Calculator (AR 600-9)

Calculate Body Fat % using US Army Standards (AR 600-9).

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Inputs

in
in
in

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Results

Body Fat %
Compliance StatusPass (Max 22%)

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Assumptions

  • The estimate assumes accurate neck, waist, height, and hip measurements taken in inches using Army-style tape-test rules.
  • Male and female calculations use different measurement sets and age-based compliance thresholds.
  • This tool estimates body fat from circumference measurements rather than from direct body-composition testing, and it does not replace the full official screening process.

Sensitivity preview

Age -10%: Body Fat % 17.50%

Age Current: Body Fat % 17.50%

Age +10%: Body Fat % 17.50%

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About this Army Body Fat

Meeting body composition standards is a requirement for all US Army personnel. If a soldier exceeds the weight-for-height screening table, they must undergo the 'Tape Test' to estimate body fat percentage. This calculator follows the official Army Regulation 600-9 equations.

Who this calculator is for

  • Active-duty soldiers and Army applicants estimating tape-test body fat before an official screening.
  • Leaders or coaches helping someone prepare for height-and-weight review.
  • Anyone comparing an Army tape-test estimate with other body-composition tools.

When to use it

  • Use this calculator to estimate tape-test body fat before an official weigh-in.
  • Use it when a soldier exceeds the screening table and wants a rough follow-up estimate.
  • Use it to compare Army standards against general body-fat methods.

How to use this calculator

  1. Select your Gender (formulas differ for male/female).
  2. Enter your Age and Height.
  3. Measure your Neck (just below the larynx).
  4. Measure your Waist (at the navel for men, narrowest point for women).
  5. For women, measure Hips (widest part of the buttocks).
  6. Check the Compliance Status to see if you meet Army standards.

Key assumptions

  • The estimate assumes accurate neck, waist, height, and hip measurements taken in inches using Army-style tape-test rules.
  • Male and female calculations use different measurement sets and age-based compliance thresholds.
  • This tool estimates body fat from circumference measurements rather than from direct body-composition testing, and it does not replace the full official screening process.

Accuracy and testing

Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.

View accuracy page

How this calculator works

The Army uses a circumferential method to estimate body fat. * Males: Body Fat % is calculated using Height, Neck, and Waist. A larger neck relative to the waist lowers the estimated body fat. * Females: Body Fat % is calculated using Height, Neck, Waist, and Hips. The result is compared against age-adjusted maximum allowable limits.

Inputs explained

Neck

Measure the circumference of the neck just below the Adam's apple. Keep the tape flat and tight to the skin but do not choke.

Waist (Men)

Measure at the navel (belly button). Arms should be at sides. Measure at the end of a normal exhale.

Waist (Women)

Measure at the point of minimal abdominal circumference (usually halfway between the hip bone and bottom rib).

Hips (Women)

Measure around the widest portion of the buttocks so the tape sits parallel to the floor.

Understanding your results

The result gives your Body Fat %. The Compliance Status tells you if you pass or fail based on your age group (e.g., a 25-year-old male is allowed up to 22% body fat).

Example scenarios

Male Soldier

Age 25, Height 70in, Neck 16in, Waist 34in. Body Fat = 16%. Pass (Max is 22%).

Female Soldier

Age 30, Height 64in, Neck 13.5in, Waist 30in, Hips 40in. Body Fat = 32%. Pass (Max is 32%).

Key Features

  • Official AR 600-9 Logic
  • Pass/Fail Indication
  • Age-Specific Limits

Things to Keep in Mind

This is an estimation. It is known to overestimate body fat in lean individuals with thin necks and underestimate it in individuals with thick necks.

Tips & Best Practices

  • Per regulation, take each measurement three times and average them to ensure accuracy.
  • Posture matters. Stand tall and look straight ahead. Looking down expands the neck and can alter the reading.
  • Do not 'suck in' your gut. The tape must be snug but not compressing the skin.

Glossary of Terms

AR 600-9
The Army Regulation governing the Army Body Composition Program (ABCP).
Tape Test
The colloquial name for the circumference-based body fat estimation method.

Frequently Asked Questions

What happens if I fail the tape test?
Soldiers who exceed the body fat standards are enrolled in the Army Body Composition Program (ABCP). They must lose weight/fat to meet standards or face separation.
Is the tape test accurate?
It typically has a margin of error of 3-4% compared to DEXA scans. It works reasonably well for the general population but can be inaccurate for bodybuilders (who may have small waists but large muscles) or those with unique body shapes.
Can I use a different method?
New Army directives sometimes allow for supplemental testing (like DXA or Bod Pod) if a soldier fails the tape test but scores high on the ACFT (Army Combat Fitness Test).