Lean body mass is the amount of weight you carry that isn't body fat. It includes muscle but also bones, water, and connective tissue, among other substances. Most scales provide overall body weight but little else regarding the actual composition of

This free lean body mass (LBM) calculator estimates LBM based on body weight, height, age, and gender. Compare the results of several popular formulas, or explore hundreds of other calculators addressing topics such as finance, math, health, fitness, and

Lean body mass is what your body would weight if you didn't have any body fat; that means it counts all the organs, bones, muscles, blood and skin, and everything else which is not fat but has mass. It is particularly important to know your lean body