|MadSci Network: Anatomy|
There is not a really scientific way to do this. The best estimate is to calculate the amount of the current body weight that is now fat (12.57% of 146.3 pounds, which is 18.4 pounds) and then the amount of body weight that would be fat at 7% body fat (7% of 146.3 pounds, which is 10.2 pounds). The difference, 8.2 pounds, would be the difference in body weight. It is important to realize that it is impossible to lose ONLY body fat; some muscle is inevitably lost in a weight loss program that emphasizes a reduction in calorie intake. Muscle might also be gained if an exercise program is adopted. If muscle is gained, body weight might increase as body fat is lost.
Try the links in the MadSci Library for more information on Anatomy.