Introduction
The Army Body Fat Calculator helps you check the U.S. Army's current body composition standard and the earlier body fat limits set by AR 600-9. Under AR 600-9, a soldier who went over the screening weight on the scale took a tape test, and the tape test decided whether they met the standard.1 The Army no longer uses the screening weight or the tape test.3 By default the tool applies the current standard, the waist-to-height ratio, and keeps the old multi-site tape test, which measures your neck, waist, and hips, as a legacy option. Just pick your tab, enter your measurements, and get your result.
This calculator checks your waist-to-height ratio against the current standard; the legacy tab gives you your estimated body fat percentage, the maximum body fat allowed for your age and sex under the earlier regulation, and whether you would have passed. It also breaks down your fat mass and lean mass so you can see where you stand.
2026 update: Army Directive 2026-13 made a waist-to-height ratio of less than 0.55 the Army's only body composition standard and withdrew the tape test in every form.2 It took effect on publication in July 2026.3 Both tape tests below are kept as a reference for the older standards.
How to use our Army Body Fat Calculator
Enter your body measurements below to estimate your body fat percentage and find out if you pass the U.S. Army body fat standard. The calculator gives you the ratio or body fat percentage, the standard it is measured against, and a pass or fail result.
Test Mode: Pick "Waist-to-Height Ratio" for the current Army standard or "Legacy Tape Test" for the multi-site method of AR 600-9, which the Army replaced in June 2023.4 The ratio needs only your waist at the navel and your height. The legacy test needs your neck, waist, and hip (females only).
Sex: Select Male or Female. AR 600-9 set different body fat limits for men and women, so in the legacy tab this choice sets your maximum allowed percentage. The waist-to-height standard is the same for every soldier.2
Unit System: Choose Imperial (pounds and inches) or Metric (kilograms and centimeters). All your measurements will convert automatically when you switch.
Age: Enter your age in years, from 17 to 80. AR 600-9 set different body fat limits for each age group, so in the legacy tab your age determines your maximum. The waist-to-height tab does not use it.
Weight: Enter your current body weight in pounds or kilograms. This is used to calculate your fat mass and lean body mass.
Height: Enter your height in feet and inches or centimeters. Both tabs use your height: the waist-to-height tab divides your waist by it, and the legacy tab puts it into the body fat formula.
Waist Circumference (at the navel): For the waist-to-height ratio, measure around your waist at the navel (belly button).3 Keep the tape snug but not tight. Take the reading at the end of a normal breath out.
Neck Circumference (Old Test): Measure around your neck just below the Adam's apple. Keep the tape level and perpendicular to your neck.
Waist Circumference (Old Test): Men measure around the abdomen at the level of the belly button. Women measure the natural waist, at the narrowest point of the abdomen, usually about halfway between the navel and the end of the breastbone.1 Take the reading at the end of a normal breath out.
Hip Circumference (Old Test, Females Only): Measure around the widest part of your hips and buttocks. Keep the tape level all the way around.
Click Calculate to see your results. Click Reset to go back to the starting example.
Army Body Fat Calculator
The U.S. Army's body fat standards were set by Army Regulation 600-9 (AR 600-9) until the 2026 change described above.2 Under AR 600-9, a soldier who went over the screening weight for their height had to take a tape test.1 This test used a measuring tape to measure certain parts of the body, and then a formula turned those numbers into a body fat percentage. If that percentage was above the allowed limit for your age and sex, you failed the standard.
How the Army Tape Test Works
The Army used two versions of the tape test before the 2026 change. The 2023 one-site test, which replaced the multi-site test in June 2023, measured only the abdomen, directly across the navel, and used a sex-specific equation to estimate body fat.4 The older multi-site tape test, kept as the legacy tab, measures more spots. For men, it measures the neck and waist. For women, it measures the neck, waist, and hips. Both tests plug those measurements into a math formula to get your body fat percentage.4
Army Body Fat Limits
Under AR 600-9, the maximum body fat percentage allowed depended on your age and sex. Younger soldiers had stricter limits. Here is a quick summary:
- Ages 17–20: 20% for men, 30% for women1
- Ages 21–27: 22% for men, 32% for women1
- Ages 28–39: 24% for men, 34% for women1
- Ages 40+: 26% for men, 36% for women1
Why Body Fat Matters in the Army
The Army tracks body fat to make sure soldiers stay fit and ready for duty. Carrying too much body fat can slow you down, hurt your endurance, and raise your risk of injury. Soldiers who do not meet the standard are flagged and enrolled in the Army Body Composition Program, and they stay enrolled until they meet the waist-to-height standard.3 Soldiers in the program cannot be promoted.1 Units may start separation for a soldier who fails the program, but no soldier will be separated until the Army completes a 180-day assessment and issues further guidance.2
If you are working to bring your body fat down, tracking your daily nutrition is essential. Monitoring your protein intake and staying properly hydrated also supports healthy fat loss while preserving lean muscle.
Tips for an Accurate Measurement
To get a good reading, measure at the right spot and pull the tape snug against the skin without pressing into it. Take each measurement three times and use the average. Measure in the morning before eating or drinking, because food, water and gas in your stomach and gut change your waist measurement.5 Stand up straight and breathe normally. Under AR 600-9 the neck measurement is rounded up to the nearest half inch and the abdominal measurement down.1
Tracking your heart rate zones, VO2 max, and calories burned during training can also help you optimize workouts to meet both fitness and body composition standards.