Lean Body Mass Calculator
Calculate your lean body mass and body fat percentage.
Pro Tip
Resistance training and adequate protein intake are key to preserving your lean body mass.
What is Lean Body Mass?
Lean body mass (LBM) is the amount of weight you carry on your body that isn't fat. The goal of any healthy weight loss program is to lose fat while preserving as much lean body mass as possible.
Beyond the Scale
Traditional scales only tell you your total weight, but lean body mass reveals the quality of that weight. Higher LBM is linked to a faster metabolism and better physical performance. Monitoring LBM helps ensure your fitness routine is building muscle rather than just reducing overall mass.
Health Indicators
Tracking your lean mass ensures that your fitness routine is effectively building muscle while optimizing your overall body composition.
Boer's Equations
LBM (Men) = 0.407 × W + 0.267 × H - 19.2For women, the formula is 0.252 × W + 0.473 × H - 48.3. These equations are widely used in clinical settings to estimate body composition without expensive scans.
Practical Applications
Active Male
A 180cm, 85kg male might have an LBM of approximately 65kg, indicating a healthy muscle-to-fat ratio.
Fitness Goal
If your goal is 15% body fat, knowing your current LBM lets you calculate exactly how much fat you need to lose.