How to Calculate Lean Mass
What is Lean Mass?
Lean body mass (muscle, bone, organs) = total weight minus fat mass. Essential for calculating dosages and understanding body composition independent of body fat percentage.
Formula
LBM = Body weight × (1 - Body fat %)
Step-by-Step Guide
- 1Enter total body weight
- 2Enter body fat percentage
- 3Calculate lean mass
Worked Examples
Input
Weight: 85 kg, Body fat: 18%
Result
LBM ≈ 69.7 kg
Fat-free mass
Common Mistakes to Avoid
- ✕Forgetting percentage conversion
- ✕Confusing with ideal weight
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