Lean Body Mass Calculator

Calculate lean body mass and fat-free mass to track muscle gains and body composition changes.

Weight Unit

Kilograms (kg)Pounds (lbs)

Total Body Weight (kg)

Body Fat Percentage (%)

About Lean Body Mass Calculator

Calculate your lean body mass (LBM), which is your total body weight minus fat mass. LBM includes muscle, bone, organs, and water. Tracking LBM helps monitor muscle retention during weight loss.