Lean Body Mass Calculator

Understanding Lean Body Mass

Lean body mass (LBM) is everything in your body except fat. It includes muscles, bones, organs, and water. The Boer formula is the most accurate for calculating LBM.

Boer Formula

  • Male: 0.407 × weight + 0.267 × height - 19.2
  • Female: 0.252 × weight + 0.473 × height - 48.3

💡 Tips

  • LBM is used to calculate body fat %
  • Higher LBM increases metabolism
  • Strength training builds LBM
  • LBM decreases with age