How accurate is the Army Body Fat Calculator?

It applies the same circumference-based formula used in the AR 600-9 tape test, so it is a reasonable estimate when measurements are taken correctly. It is still an estimate — an official evaluation uses trained personnel and calibrated tape.

What measurements does the Army body fat method use?

For men it uses height, neck, and waist (abdomen) circumference. For women it adds hip circumference to the same three measurements, since fat distribution differs by sex.

Where do I measure waist and neck for the AR 600-9 formula?

Waist is measured at the navel level, and neck is measured just below the larynx with the tape sloping slightly downward at the front, following the standard Army tape test procedure.

What is the max allowed body fat percentage in the Army?

The commonly published age-band maximums used here are 20% (17-20), 22% (21-27), 24% (28-39), and 26% (40+) for men, with higher bands for women. Enter your age to see your estimate compared to your band.

Is this Army Body Fat Calculator official or medical advice?

No. It is a general estimate using a published formula, not an official readiness score and not medical advice. Only a trained evaluator with calibrated equipment can produce an official Army body-fat result.

Are my height and body measurements uploaded anywhere?

No. The Army Body Fat Calculator runs entirely in your browser. Every measurement you type stays on your device and is never sent to ArrayKit.

Army Body Fat Calculator Online

Estimate body fat percentage with the US Army AR 600-9 circumference method in your browser. General estimate only, not medical advice.

The Army Body Fat Calculator runs entirely in your browser. Height, neck, waist, hip, and age never leave your device and nothing is uploaded to ArrayKit. This is a general estimate using a standard formula, not medical advice.

Open the Body Fat Calculator

About Army Body Fat Calculator

Army Body Fat Calculator estimates body fat percentage using the circumference-based tape test method described in AR 600-9, the US Army's body composition regulation. Enter height, neck, and waist for men, or height, neck, waist, and hip for women, and it applies the standard logarithmic formula to return an estimated body fat percentage. Add an optional age to see it compared against the commonly published age-band maximum for your sex, with a clear within-standard or exceeds-standard flag. It is useful for service members prepping for a tape test, recruiters, fitness coaches, and anyone curious how the Army method compares to other body-fat estimates. This is a general estimate using a standard formula, not medical advice or an official readiness determination — only a trained evaluator with calibrated tape can produce an official result. Everything runs locally in your browser.

Features

Computes body fat percentage with the AR 600-9 circumference formula
Separate male formula (waist and neck) and female formula (waist, hip, and neck)
Optional age input compares your estimate to the published max-allowed standard
Clear within-standard or exceeds-standard badge once age is provided
Works entirely in inches, matching how the Army tape test is measured
Copy button for a plain-text summary of every measurement and result
Instant validation catches measurements that would break the formula
Runs entirely in your browser with no measurements sent anywhere

How to use the Army Body Fat Calculator

Choose male or female to load the matching AR 600-9 formula
Enter height, neck, and waist in inches
Enter hip in inches as well if you selected female
Optionally enter age to compare against the max-allowed standard
Read the estimated body fat percentage and copy the summary if needed

Example

Input

male, height 70in, waist 34in, neck 16in

Output

Body fat: ~15.5%

Common errors & troubleshooting

The result looks impossibly high or shows an error for a male entry. — The male formula needs waist minus neck to be a positive number — double-check the waist measurement was taken at the navel and the neck below the larynx, not swapped.
Female entry shows 'Enter a hip measurement greater than 0.' — The AR 600-9 female formula requires hip circumference in addition to waist and neck — fill in the hip field before reading a result.
Measurements were entered in centimeters and the estimate looks off. — The Army Body Fat Calculator expects inches, matching how the official tape test is measured — convert centimeters to inches first.
The standard badge doesn't appear even though a result is shown. — The within-standard comparison only appears once an age is entered, since the maximum allowed body fat percentage depends on age band.

Frequently asked questions

How accurate is the Army Body Fat Calculator?: It applies the same circumference-based formula used in the AR 600-9 tape test, so it is a reasonable estimate when measurements are taken correctly. It is still an estimate — an official evaluation uses trained personnel and calibrated tape.
What measurements does the Army body fat method use?: For men it uses height, neck, and waist (abdomen) circumference. For women it adds hip circumference to the same three measurements, since fat distribution differs by sex.
Where do I measure waist and neck for the AR 600-9 formula?: Waist is measured at the navel level, and neck is measured just below the larynx with the tape sloping slightly downward at the front, following the standard Army tape test procedure.
What is the max allowed body fat percentage in the Army?: The commonly published age-band maximums used here are 20% (17-20), 22% (21-27), 24% (28-39), and 26% (40+) for men, with higher bands for women. Enter your age to see your estimate compared to your band.
Is this Army Body Fat Calculator official or medical advice?: No. It is a general estimate using a published formula, not an official readiness score and not medical advice. Only a trained evaluator with calibrated equipment can produce an official Army body-fat result.
Are my height and body measurements uploaded anywhere?: No. The Army Body Fat Calculator runs entirely in your browser. Every measurement you type stays on your device and is never sent to ArrayKit.

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