I remeasured the other day and the site said that I was 17%. It is total BS. There is no way in hell that someone that can easily grab 2 handfulls of fat on their 45" gut is only 17%. It may be accurate for some people, but not for me. I think that what it does is take shoulder, waist, and hip ratios mainly to figure it. I have always had very broad shoulders which helps to compensate for my thick waistline. I think that is what threw my readings off.