How to Calculate Lean Body Mass
Calculate your lean body mass from weight and body fat percentage.
The Formula
LBM = weight × (1 − BF%)The lean body mass formula uses the mathematical relationship: LBM = weight × (1 − BF%). Each variable in the formula represents a measurable quantity that affects the final result.
Step-by-Step Method
- 1Identify all input values needed for the lean body mass calculation.
- 2Substitute your known values into the formula: LBM = weight × (1 − BF%).
- 3Perform the arithmetic operations in the correct order (PEMDAS/BODMAS).
- 4Check that your result has the correct units and is within a reasonable range.
- 5Verify using the interactive Lean Body Mass Calculator to confirm your answer.
Related Topics
lean body masslbmbody compositionhealth
Use the Interactive Calculator
Skip the manual math — get instant results with our free Lean Body Mass calculator.