Army Body Fat Calculator

Body fat percentage is no longer an official U.S. Army standard. On July 7, 2026, Army Directive 2026-13 rescinded the tape test, the height and weight screening tables, and every supplemental body fat method the Army used. The standard today is a single ratio: waist measured at the navel, divided by height, both in inches, must come out below 0.550.

This Army body fat calculator runs the older AR 600-9 tape-test formula. It is kept here for historical reference and personal fitness tracking, not as a current Army requirement. If you need the standard that applies to Soldiers right now, use the Army WHtR calculator.

What the Army Measures Today

The current standard is the waist-to-height ratio, or WHtR. Measure your waist at the navel in inches, divide by your height in inches, and the result must be less than 0.550. There is no age band, no gender adjustment, and no body fat percentage calculated at any point.

Precision matters more than it used to. The Army records the ratio to three decimal places and truncates rather than rounds, so a 0.549 passes and a 0.550 fails. At six feet tall, that is the difference between a 39.5-inch waist and a 39.6-inch waist.

Soldiers are screened at least twice per calendar year, and a commander may direct a screening at any time if they believe a Soldier is out of standard. A ratio of 0.550 or higher triggers a confirmation measurement by a different team on the same duty day. If the confirmation also fails, the Soldier is flagged and enrolled in the Army Body Composition Program, which blocks promotion, schools, and reenlistment until the standard is met.

Two details catch people off guard. The fitness-test exemption is gone. Army Directive 2025-17, which exempted Soldiers scoring 465 or higher on the Army Fitness Test from body composition screening, is now inactive. A Soldier can max every event and still be flagged on the tape. And there is no appeal by measurement. DEXA scans, InBody, and Bod Pod assessments were rescinded alongside the tape test, so a failing ratio cannot be challenged with a more precise method. Medical exemptions for pregnant and postpartum Soldiers remain in effect.

The policy applies to every Soldier, including USMA and Senior ROTC cadets. No Soldier will be separated for a WHtR failure until the Department of the Army completes a 180-day assessment of the new standard and issues further guidance.

Old Tape Test vs. the 2026 Standard

How the Army’s Body Fat Formula Worked

The AR 600-9 method never measured fat directly. It estimated it from circumference using a logarithmic regression, which is why a tape measure was enough and no scale, caliper, or scanner was required. That practicality is exactly why the Army used it in the field for over two decades.

For men, the formula uses height, neck, and abdominal circumference:

% body fat = 86.010 × log₁₀(waist − neck) − 70.041 × log₁₀(height) + 36.76

For women, it adds hip circumference:

% body fat = 163.205 × log₁₀(waist + hip − neck) − 97.684 × log₁₀(height) − 78.387

Weight appears nowhere in either equation. That surprises people who expect a scale to be involved, but weight only mattered at the earlier screening step, which decided whether a Soldier was taped at all. Once you were being taped, only circumference and height counted.

How to take the measurements?

1. Neck — just below the larynx, with the tape sloping slightly downward at the front. Stand upright with your head level.
2. Waist — at navel level, standing relaxed, at the end of a normal exhale. Do not suck in.
3. Hip — women only, around the widest point of the hips and buttocks, tape held horizontal.
4. Round each measurement to the nearest half-inch.

Take three readings at each site and average them. Tape error is the biggest source of variation in this method: a half-inch difference at the waist shifts the estimate by roughly a full percentage point, which was often the margin between passing and failing.

A worked example

A male Soldier is 70 inches tall with a 15.5-inch neck and a 36-inch waist. The waist-minus-neck difference is 20.5 inches. Running the formula gives roughly 18.9% body fat, comfortably inside the old 22% limit for his age group. Under today’s standard, none of that matters: his ratio is 36 ÷ 70 = 0.514, and that single number is the whole assessment.

Three Eras of Army Body Composition Measurement

Most calculators online blur these together, which is why results and advice vary so widely across sites. They are three distinct methods with three different governing documents.

The shift to a single site came out of research from the Army Research Institute of Environmental Medicine, which found that one abdominal measurement predicted body fat more consistently across a diverse population than the multi-site formula, while cutting measurement error and administrative time at unit weigh-ins. The one-site method became the only authorized circumference method Army-wide in June 2024.

The calculator on this page uses the multi-site formula, since that is the version most people mean when they search for the Army tape test. If you want a general-purpose estimate that is not tied to military policy, the body fat calculator offers several standard methods.

Legacy Body Fat Limits by Age

These maximums applied under AR 600-9 before July 7, 2026. They were tied to the tape test, and when the tape test was rescinded the percentage limits went with it. They are shown here for historical reference and comparison only.

DA Form 5500 and DA Form 5501

Circumference measurements and the resulting percentage were recorded on DA Form 5500 for men and DA Form 5501 for women. Both carried pre-printed lookup tables so unit personnel could read off a Soldier’s percentage without working the logarithm by hand.

Under the current directive, DA Form 5500 is still referenced for recording WHtR results in the Army Training Information System, but the body fat worksheet function of both forms is obsolete. Every Soldier had 90 days from publication to have a ratio recorded, which set the deadline in early October 2026.

How the Other Branches Compare?

Every service now uses waist-to-height ratio. The change traces to a December 18, 2025 memo from the Department of Defense’s personnel and readiness office, which directed all branches off height-and-weight tables. The Army was the last branch to adopt it.

The Marine Corps set the tighter line in February 2026, on the reasoning that most Marines below 0.52 already earn first-class fitness scores. Before this consolidation, each branch ran its own circumference formula with separately validated regression constants, which is why an Army estimate and a Navy estimate from identical measurements never quite matched.

Frequently Asked Questions

Is body fat percentage still an Army standard?

No. Army Directive 2026-13 rescinded it on July 7, 2026. There is no body fat percentage a Soldier is currently required to meet. The standard is a waist-to-height ratio below 0.550.

How accurate is the Army tape-test formula?

It lands within roughly 3 to 5 percentage points of laboratory methods such as DEXA, and it systematically overestimates body fat on muscular builds because a thicker neck widens the waist-minus-neck gap in the wrong direction. It was always a field screening tool, never a diagnostic one. Treat any result as a directional number.

Can I request a tape test or DEXA scan to appeal a failed WHtR?

No. All previous assessment methods were rescinded, so there is no alternative measurement to appeal into. The only way to change a failing ratio is to change the measurement.

Does a high Army Fitness Test score exempt me?

Not anymore. The exemption for Soldiers scoring 465 or higher, granted under Army Directive 2025-17, is inactive. Performance and body composition are now assessed independently.

What happens if I fail the screening?

A ratio of 0.550 or higher triggers a same-day confirmation test by a different measuring team. If that confirms, you are flagged and enrolled in the Army Body Composition Program. No Soldier will be separated for a WHtR failure until the Army completes its 180-day assessment of the standard.

What inputs does this calculator need?

Height, neck, and waist circumference for men; height, neck, waist, and hip circumference for women. Weight is not part of the legacy formula.

Why keep this calculator online at all?

For historical reference, for anyone researching prior policy, and for tracking personal progress against a benchmark many people already know. Body composition still matters for health even when a specific percentage is no longer a service requirement. For related estimates, see the BMI calculator and the BMR calculator.

Sources

• U.S. Army, “Army modifies body composition program, adopts waist-to-height ratio,” July 7, 2026 — army.mil
• Army Directive 2026-13, Army Body Composition Program and Standards — Army Publishing Directorate
• Military.com, “Army Soldiers Have 90 Days to Get Measured Under New Height-Weight Rules,” July 2026
• Army Times, “Army scraps height-and-weight tables in favor of waist-to-height assessment,” July 7, 2026
• AR 600-9, The Army Body Composition Program
• Army Directive 2023-11, one-site circumference method