how to calculate body fat percentage livestrong?
Convert your lean body mass to your body fat percentage. Your body fat percentage is equal to (body weight - lean body mass) / (body weight) x 100. Using the previous example for a man, you weigh 155 pounds and have a lean body mass of 116 pounds Your body fat percentage is (155 - 116) / 155 x 100 = 25.2 percent.