The Army Body Fat Calculator is based on the U.S. Army , published on June 27, 2019. This calculator will determine body fat percentage and whether the calculated body fat percentage is in compliance with the army recruitment standard, the standard after entry into the army, or the most stringent standard of being in compliance with the Department of Defense goal. To ensure accuracy, take the average of at least three measurements. If possible, measure to the nearest 1/2 or 1/4 inch. Gender Age Height Neck just below the level of larynx (Adam's apple) Waist at the level of the navel (belly button) Waist at the point of min abdominal circumference Hip where the buttocks protrude backward the most