How does the military calculate body fat percentage in 2023?

Since 2023 the military has used a method of measuring body fat percentage with just one tape measure. All that is required is weight and waist circumference at the belly button level. Body fat percentage is then calculated using these two data points through a linear function, with different factors for men and women. Measurements of height, neck circumference, and hip circumference are no longer used.

What is the maximum allowable body fat percentage for the military?

For active soldiers the maximum values for body fat percentage are as follows: For men these are 20%, 22%, 24% and 26%, corresponding to age groups of 17 to 20 years, 21 to 27 years, 28 to 39 years and from 40 years respectively. The maximum values for women in the same age group are 30%, 32%, 34% and 36%. Applicants for service in the army are subject to slightly higher limits.

How to measure your waist for tape measure preparation?

Measure your waist circumference with a tape measure while standing up straight with your arms hanging loosely at your sides and the tape measure wrapped around your waist once, roughly level with your belly button. The tape should be snug but not pinching. Take the measurement at the end of a normal breath without sucking in your stomach. Take three measurements, average them together, and round to the nearest half inch.

What happens if you don't meet the Army's body fat limits?

You may be flagged and required to undergo additional testing such as DXA scans, InBody 770 measurements or Bod Pod analysis (if available). If you fail to volunteer or pass the test, then you will participate in the Army Body Composition Program and receive systematic nutritional and training counseling. Passing the Army Combat Fitness Test with a very good score may result in being exempt from testing.

Why are there different limit values for men and women?

Because women are naturally more essential fat than men to maintain healthy hormone function, the military allows women of any age a body fat percentage that is about ten points higher than for men. For both men and women, the upper limits gradually increase with age.

Army Body Fat Calculator

Your measurements

Sex

Dropdown list for MaleFemale

Retention limits apply to serving soldiers; accession limits are the more lenient thresholds for joining. New recruits get 180 days to meet the retention standard.

Remain in the Army (retention standard)

Join the Army (accession standard)

Age (years)

Body weight

Abdominal circumference

Estimated body fat

Choose your sex, then enter your body weight and abdominal circumference to see your body fat percentage and whether it meets the Army standard.

Please input values into the fields

Charts and standards

The military body fat calculator estimates your body fat percentage based on a single tape measure in 2023 and tells you if you meet the US Army standards for age and gender. By entering your sex, age, weight, and waist circumference it will show your body fat percentage, the maximum value for that age group within the military, and the difference between those two values.

A single measurement with a tape measure in 2023.

In 2023 the military changed from traditional measurements with a tape measure at several points to one single measurement. The previous method measured men's neck and waist circumference, while women also had their hip circumference recorded. The new method of just one point requires only weight and abdominal circumference at navel level.

This change is based on comprehensive studies of body composition within the military that assessed over 2600 soldiers who underwent traditional testing. The previous formulas often resulted in well-muscled soldiers being classified as "overweight" even though they were healthy and performing well. By switching to a single measurement, this error was reduced and results are more consistent regardless of which personnel is conducting the measurements.

Calculation basis:

The body fat percentage is a linear function of the weight (in pounds) and waist circumference (in inches). The coefficients differ for men and women.

\%\text{BF}_{\text{men}} = -26.97 - 0.12\,W_{\text{lb}} + 1.99\,A_{\text{in}}

\%\text{BF}_{\text{women}} = -9.15 - 0.015\,W_{\text{lb}} + 1.27\,A_{\text{in}}

In this formula, W is weight in pounds and A is waist circumference in inches. The data can be entered either in pounds and inches or kilograms and centimeters. The calculator will convert the units before applying the formula. For example, a man who weighs 170 pounds and has a waist measurement of 32 inches would have an estimated body fat percentage of 16.3%.

-26.97 - 0.12 \times 170 + 1.99 \times 32 = 16.31\%

Applicable limits for maximum allowable body fat percentage

The military has maximum body fat percentages that are set by age and gender. Active duty soldiers must meet the following standards (Armed Forces Regulation 600-9). The acceptable ranges for women are higher in all age groups than men because women store more essential fat in their bodies.

Age group	Male	Female
17 to 20	20 percent	30 percent
21 to 27	22 percent	32 percent
28 to 39	24 percent	34 percent
40 and over	26 percent	36 percent

Enlistment standards for the military are less strict, with slightly higher scores being accepted in each category. New recruits must meet stricter service requirements within 180 days of enlistment.

Age group	Male (joining)	Female (joining)
17 to 20	26 percent	32 percent
21 to 27	26 percent	32 percent
28 to 39	28 percent	34 percent
40 and over	30 percent	36 percent

How to measure your waistline

The accuracy of the measurement depends on measuring your waist circumference correctly so take your time. Use a flexible tape measure and place it around your abdomen at the level of your belly button. Do not measure above or below your belly button. Stand up straight, with your arms hanging loosely by your sides and distribute your weight evenly onto both feet.

The tape is placed on the skin but not too tight. The measurement is taken at the end of a normal breath so do not pull in your stomach. At least three measurements should be done and averaged with rounding to the nearest half inch. Weight will be rounded to the nearest pound. If you want to track changes over several weeks, it helps to take the measurements at the same time each day.

What happens if the criteria are not met?

Soldiers who score a total of 540 or more on the Army Combat Fitness Test (ACFT) and earn at least 80 points in each event will not be required to take the body fat analysis. This protects soldiers with high muscle mass and elite performance.

Soldiers who are not exempt and exceed the limits will be marked and may be referred for additional assessments such as DXA scans, InBody 770 analysis or Bod Pod tests (if reasonably available). Soldiers who fail to request or pass these additional assessments will be subject to the Army Body Composition Program. The program provides systematic nutritional and training counseling to help soldiers bring their body composition back into the reference range.

Fat mass, fat-free mass and fat reduction

Once weight and body fat percentage are known a calculation tool will split the weight into fat mass and lean mass. Fat mass is the result of multiplying your weight by your body fat percentage while lean mass makes up the rest and includes muscle, bone, organs, water etc. If you exceed the limits it also estimates how much fat you need to lose to meet the limits without changing your current lean mass. Tracking this data monthly can show progress that may be overlooked with a simple bathroom scale as it is possible to keep muscle while losing fat which will not reflect on the weight.

This calculator is for general educational and planning purposes only. It estimates body fat percentage using a method used by the military and is not intended to replace official measurements or medical advice. Please consult with a qualified professional before making any changes to your diet, exercise program, or weight.

Frequently asked questions

How does the military calculate body fat percentage in 2023?: Since 2023 the military has used a method of measuring body fat percentage with just one tape measure. All that is required is weight and waist circumference at the belly button level. Body fat percentage is then calculated using these two data points through a linear function, with different factors for men and women. Measurements of height, neck circumference, and hip circumference are no longer used.
What is the maximum allowable body fat percentage for the military?: For active soldiers the maximum values for body fat percentage are as follows: For men these are 20%, 22%, 24% and 26%, corresponding to age groups of 17 to 20 years, 21 to 27 years, 28 to 39 years and from 40 years respectively. The maximum values for women in the same age group are 30%, 32%, 34% and 36%. Applicants for service in the army are subject to slightly higher limits.
How to measure your waist for tape measure preparation?: Measure your waist circumference with a tape measure while standing up straight with your arms hanging loosely at your sides and the tape measure wrapped around your waist once, roughly level with your belly button. The tape should be snug but not pinching. Take the measurement at the end of a normal breath without sucking in your stomach. Take three measurements, average them together, and round to the nearest half inch.
What happens if you don't meet the Army's body fat limits?: You may be flagged and required to undergo additional testing such as DXA scans, InBody 770 measurements or Bod Pod analysis (if available). If you fail to volunteer or pass the test, then you will participate in the Army Body Composition Program and receive systematic nutritional and training counseling. Passing the Army Combat Fitness Test with a very good score may result in being exempt from testing.
Why are there different limit values for men and women?: Because women are naturally more essential fat than men to maintain healthy hormone function, the military allows women of any age a body fat percentage that is about ten points higher than for men. For both men and women, the upper limits gradually increase with age.

Related calculators

Body Fat CalculatorEstimate your body fat percentage with the U.S. Navy, BMI, or RFM method, see your category, fat and lean mass, FFMI, and a goal weight.

Body Fat Percentage CalculatorFind your body fat percentage from tape measurements or BMI, or enter a number you already know, then see your category, fat and lean mass, FFMI, and your ideal body fat for your age.

Army Fitness Test (AFT) CalculatorScore all five Army Fitness Test events by age and standard, see your total out of 500, and check your pass or fail status before test day.

BAI Calculator (Body Adiposity Index)Estimate your body fat percentage from hip circumference and height with the Body Adiposity Index, classify it by age and sex, and compare it against BMI.

Body Water CalculatorEstimate the total volume of water in your body from your height, weight, age and sex using the Watson, Hume-Weyers and mL per kilogram methods, with the compartment breakdown and your normal range.

Body Frame Size CalculatorFind your body frame size (small, medium, or large) from your wrist circumference or elbow breadth and height, for women and men.

Disclaimer: This calculator is provided for general informational and educational purposes only. Our calculators are under active development, and results may be inaccurate, incomplete, or unsuitable for your situation. Always verify the figures independently and seek advice from a qualified professional before relying on them. We make no warranties and accept no liability for any loss or decision arising from use of this tool.

References

Army Regulation 600-9: The Army Body Composition Program
The regulation defining body fat assessment and maximum allowable standards.
Army Directive 2023-11: Army Body Fat Assessment for the ABCP
The directive introducing the one-site circumference-based tape method.
DoD Instruction 1308.03: DoD Physical Fitness and Body Composition Programs
The Department of Defense framework for body composition assessment.