Army Body Fat Calculator
Estimate body fat with the U.S. Army (AR 600-9) tape method and check the standard.
Results update as you type.
About this calculator
The U.S. Army body fat calculator uses the AR 600-9 circumference (tape) method to estimate body-fat percentage from height and a few measurements. Men use abdomen minus neck; women use waist plus hip minus neck. It also compares the result against the Army maximum allowable body fat for your age and sex.
Frequently asked questions
What is the AR 600-9 formula?
For men, %BF = 86.010 × log10(abdomen − neck) − 70.041 × log10(height) + 36.76. For women, %BF = 163.205 × log10(waist + hip − neck) − 97.684 × log10(height) − 78.387, with all measurements in inches.
What is the maximum allowable Army body fat?
It rises with age. For men it is 20% (17–20), 22% (21–27), 24% (28–39) and 26% (40+); for women 30%, 32%, 34% and 36% across the same bands. The calculator flags whether you are within the limit.
How is this different from the Navy method?
Both use tape measurements, but the constants differ and the Army compares your result to service body-composition standards. Neither replaces a lab method like DEXA for precision.
Results are estimates for general guidance only, not financial, medical or tax advice.