No. This is not a accurate matrix to be used. Trust me. Ive been a victim of this standard myself. When I was active duty Navy, using this body fat calculator, I was way over body fat percentage. Im 5'11 and weighed 180 lbs for my 8 year enlistment. But my skinny ass neck threw the math off. Im not kidding, my buddy Bucket head was a fat fuck who could make his neck the size of my waist when it came time to measure. Luckily i never had to go to fat boy camp or mando PT cuz i still came in under body weight. Overweight plus out of body fat standards equals mando. It was just a joke the way they did it. Not sure whats changed since 2005.