but it actually puts me at a higher percentage than the measurement method. And one BMI tool, which takes your height and weight, has me at 30%. I'm using the 36%, possibly 35 or 34 now. It honestly seems like the more accurate of the three.. It gives me a point to work from, and shows changes in nice little digital numbers. I don't have to remeasure all my parts, and look up its meaning in little charts.