LEAN BODY MASS PERCENTAGES (LBM%)

Lean body mass is the weight of bones, muscles and organs. Sum of everything other than fat and water in your body. For accurate results know your body fat percentages from your doctor. Below are the rough body fat percentages found from various references.

Body fat percentages for women:

   Age         Underfat             Healthy           Overweight      Obese
20 - 39     less than 21%     21% - 33%      33% - 39%     over 39%
40 - 59     less than 23%     23% - 35%      35% - 40%      over 40%
60 - 79     less than 24%     24% - 36%      36% - 42%      over 42%

Body fat percentages for men:

   Age         Underfat              Healthy            Overweight      Obese
20 - 39     less than 8%         8% - 19%       19% - 25%      over 25%
40 - 59     less than 11%      11% - 22%       22% - 27%     over 27%
60 - 79     less than 13%      13% - 25%       25% - 30%     over 30%

calculate the lean body mass,

LBM = 100 - (body fat % / 100) X weight in kg