A body fat calculator lean mass is an online tool that estimates the amount of lean body mass (LBM) a person has. LBM is the weight of the body minus the weight of fat. It includes muscles, bones, organs, and water. For example, a person who weighs 150 pounds and has 20% body fat has a lean body mass of 120 pounds.
Body fat calculators are important because they can help people track their progress in losing weight or gaining muscle. They can also be used to estimate a person’s risk of developing certain health conditions, such as heart disease and diabetes. The first body fat calculator was developed in the 1960s. Since then, a number of different body fat calculators have been developed, each with its own strengths and weaknesses.