Army Body Fat Calculator
Estimate your body fat percentage using the U.S. Army one-site tape test introduced in June 2023. Enter your sex, age, weight and abdominal circumference to see your result, your fat and lean mass, whether you meet the accession or retention standard for your age, and how much weight you would need to lose to reach the limit or the long-term Department of Defense goal.
Formula
Worked example
A 25-year-old man weighing 180 lb with a 34 in abdomen: -26.97 - 0.12(180) + 1.99(34) = -26.97 - 21.6 + 67.66 = 19.1%, under the 22% retention limit for his age. That is about 34.4 lb of fat and 145.6 lb of lean mass; reaching the 18% DoD goal would mean losing roughly 2.4 lb of fat.
The 2023 one-site tape test
In June 2023 the Army replaced its old multi-site tape test with a simpler one-site method, following the Army Comprehensive Body Composition study and ALARACT 046/2023. Instead of measuring the neck, waist and (for women) hips against height, the new test estimates body fat from just two numbers: your body weight and your abdominal circumference at the navel. This calculator uses the official one-site equations, so the inputs match what you will be measured on today. Note that many older calculators still ask for neck and height, which means they are running the retired method.
How body fat is estimated
The estimate comes from a regression equation fitted to the study data. For men, body fat percent = -26.97 - 0.12 x weight (lb) + 1.99 x abdomen (in). For women it is -9.15 - 0.015 x weight (lb) + 1.27 x abdomen (in). Abdominal circumference dominates the result, which is why an accurate tape measurement matters far more than small changes in weight. Enter metric units if you prefer; the calculator converts to pounds and inches before applying the formula, then reports your fat and lean mass back in your chosen unit.
Fat mass, lean mass and a weight-loss target
Once your body fat percentage is known, the calculator splits your scale weight into fat mass (weight times body fat percent) and lean mass (everything else: muscle, bone, organs and water). The weight-loss target uses a standard assumption that you keep your lean mass and lose only fat: the goal weight is your lean mass divided by one minus the target body fat fraction. Pick the Army limit for your age, the long-term Department of Defense goal of 18% for men and 26% for women, or your own custom number, and the tool shows the fat weight you would need to drop to get there.
Accession and retention standards
The Army uses two sets of limits. Retention standards apply to soldiers already serving and run from 20% for men aged 17 to 20 up to 26% at 40 and over, and from 30% to 36% for women. Accession standards apply to applicants joining the Army and are a few points higher for men (24% to 30%) while matching the retention figures for women. Choose the standard that fits your situation with the toggle above. Soldiers only take the tape test if they exceed the height and weight screening table; passing that screen means you are compliant and are not taped.
How to measure correctly
Stand relaxed and breathe normally. Place the tape horizontally around your bare abdomen at the level of the belly button, snug but not compressing the skin, and read it at the end of a normal exhale. Take three measurements and average them, rounding to the nearest half inch, then round your weight to the nearest pound. Good technique is the single biggest factor in an accurate result, since the formula multiplies the abdominal figure by about two. This tool is an estimate for personal tracking and does not replace an official measurement by trained personnel.
Army maximum body fat by age and standard
| Age | Retention M | Retention F | Accession M | Accession F |
|---|---|---|---|---|
| 17 to 20 | 20% | 30% | 24% | 30% |
| 21 to 27 | 22% | 32% | 26% | 32% |
| 28 to 39 | 24% | 34% | 28% | 34% |
| 40 and over | 26% | 36% | 30% | 36% |
Retention limits apply to serving soldiers under the Army Body Composition Program (AR 600-9). Accession limits apply to applicants joining the Army. The long-term Department of Defense goal is 18% for men and 26% for women.
Frequently asked questions
Why does this calculator not ask for my neck or height?
Because the Army changed the test in June 2023. The current one-site method uses only body weight and abdominal circumference. The older method that measured neck, waist and height (and hips for women) was retired, so calculators that still ask for those inputs are out of date.
What body fat percentage does the Army allow?
For serving soldiers (retention), the maximum ranges from 20% (men aged 17 to 20) to 26% (40 and over), and from 30% to 36% for women, increasing with age. Applicants joining the Army (accession) face limits a few points higher for men, 24% to 30%. The chart above lists every band for both standards.
What is the difference between fat mass and lean mass?
Fat mass is the portion of your weight that is body fat: your scale weight multiplied by your body fat percentage. Lean mass is everything else, including muscle, bone, organs and water. The calculator shows both so you can see how much of a weight change would need to come from fat to reach a target percentage.
How is the weight to lose calculated?
It assumes you keep all of your lean mass and lose only fat. The target weight is your lean mass divided by one minus the target body fat fraction, and the weight to lose is your current weight minus that target. Real fat loss also costs some lean mass, so treat the figure as a planning estimate rather than a guarantee.
How accurate is the tape-test estimate?
The one-site method is a population estimate, not a precise body-composition measurement like a DEXA scan. It can be off for very muscular or unusually proportioned individuals, but it is designed to be quick, repeatable and fair across a large force.
Do I have to take the tape test?
Only if you exceed the Army height and weight screening table for your height. Soldiers who pass that screen are considered compliant and are not taped.