Army Body Fat Calculator — 2024 One-Site Tape Test

Estimate Army body fat using the official 2024 one-site tape method or the legacy 3-site formula. Checks against age-based standards.

July 3, 2026

Age

Weight (lb)

Waist / Abdominal Circumference (in, at navel)

Estimated Body Fat (One-Site (2024 official))

19.1%

Within the 22% standard for male age 25.

One-Site formula (Army Directive 2023-11, sole authorized method since 2024): Male = −26.97 − 0.12×weight(lb) + 1.99×waist(in); Female = −9.15 − 0.015×weight(lb) + 1.27×waist(in). Legacy 3-site formula (Male): 86.010×log₁₀(waist−neck) − 70.041×log₁₀(height) + 36.76. This is an estimate for reference only — official Army Body Composition Program assessments must be performed by a trained, certified taping technician.

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Reference Values

Last verified: Jul 2, 2026

Category	Range	What It Means	Status
Male, age 17–20 ★	Max 20% body fat	Army Body Composition Program (AR 600-9) maximum allowable body fat by age bracket.	★ Best
Male, age 21–27	Max 22% body fat		Good
Male, age 28–39	Max 24% body fat		Okay
Male, age 40+	Max 26% body fat		Poor
Female, age 17–20 ★	Max 30% body fat		★ Best
Female, age 21–27	Max 32% body fat		Good
Female, age 28–39	Max 34% body fat		Okay
Female, age 40+	Max 36% body fat		Poor

Source: Army Directive 2023-11 / AR 600-9 Army Body Composition Program — one-site abdominal circumference tape test (sole authorized method as of 2024). Standards summarized from official Army Body Composition Program tables.

Worked Examples

Male, One-Site Method

Method: One-Site (2024 official)
Sex: Male
Weight: 180 lb
Waist: 34 in

19.1% body fat

−26.97 − (0.12×180) + (1.99×34) = −26.97 − 21.6 + 67.66 = 19.09%. Well under the 22% max for a 21–27-year-old male.

Female, One-Site Method

Method: One-Site (2024 official)
Sex: Female
Weight: 150 lb
Waist: 30 in

26.7% body fat

−9.15 − (0.015×150) + (1.27×30) = −9.15 − 2.25 + 38.1 = 26.7%. Under the 32% max for a 21–27-year-old female.

Male Near the Age-40+ Limit

Method: One-Site (2024 official)
Sex: Male
Age: 42
Weight: 210 lb
Waist: 40 in

27.4% body fat — over the 26% limit for age 40+

−26.97 − (0.12×210) + (1.99×40) = −26.97 − 25.2 + 79.6 = 27.43%. Above the age-40+ male standard of 26%, meaning this soldier would fail the tape test at this measurement.

How to Use This Calculator

1

Choose a method

One-Site (2024 official, uses only weight + waist) or Legacy 3-Site (neck/waist/height, plus hip for women).
2

Select sex and enter age

Age determines which standard your result is checked against — it isn't part of the body-fat formula itself.
3

Enter your measurements

Weight in pounds; circumferences in inches, measured snug but not compressed.
4

Read your estimated body fat and standard check

Shows whether your estimate is within your age/sex bracket's maximum allowed body fat.

What Each Value Means

One-Site Body Fat % (% body fat): Estimated body fat percentage using only body weight and abdominal (navel-level) circumference — the Army's sole authorized method as of 2024.
Legacy 3-Site Body Fat % (% body fat): Estimated body fat percentage using the older neck, waist, height (and hip, for women) circumference formula, superseded as the official Army standard but still widely used by civilian calculators.

Frequently Asked Questions

What changed with the Army's body fat test in 2024?

As of Army Directive 2023-11, the Army replaced the older multi-site tape test (which measured neck, waist, and — for women — hip) with a streamlined one-site method that uses only abdominal circumference at the navel plus body weight. As of 2024, the one-site method is the sole authorized measurement for the Army Body Composition Program.

Is the Army body fat formula the same for men and women?

No. The one-site formula uses different coefficients by sex: Male = −26.97 − 0.12×weight(lb) + 1.99×waist(in); Female = −9.15 − 0.015×weight(lb) + 1.27×waist(in). Age isn't part of the body-fat calculation itself — it only determines which maximum-allowed standard applies to you.

What are the Army's maximum body fat standards?

Standards increase with age. For men: 20% (age 17–20), 22% (21–27), 24% (28–39), 26% (40+). For women: 30% (17–20), 32% (21–27), 34% (28–39), 36% (40+). Falling above your bracket's maximum on the official tape test means entry into the Army Body Composition Program.

How accurate is a self-measured tape test compared to the official one?

Self-measurement is a reasonable estimate but the official Army standard requires measurements taken by a trained, certified taping technician following exact positioning and tension rules — even small measurement errors (a loose tape, wrong landmark, or measuring over thick clothing) can shift the result by several percentage points. Use this calculator to track trends and gut-check your standing, not as a substitute for an official assessment.

Why does the calculator offer a legacy 3-site option?

The older neck/waist/hip method is no longer the Army's official standard, but it's still useful as a cross-check and is what most civilian body-fat calculators and fitness trackers still use, since the underlying Navy/DoD circumference formula it's based on remains widely published and referenced.