Lean Body Mass Calculator

How to calculate Lean Body Mass?

Lean Body Mass (LBM) is a measurement of your body composition that is calculated by subtracting your total body fat weight from your total body weight.

The Boer formula is one of the most widely used methods:
Male: 0.407 × W + 0.267 × H - 19.2; Female: 0.252 × W + 0.473 × H - 48.3

Using the LBM calculator: an example

For a male who is 180cm tall and weighs 80kg, the Boer formula provides an estimate of his lean mass.

Step-by-step calculation:

• Multiply weight by 0.407
• Multiply height by 0.267
• Subtract 19.2 to find LBM

Frequently Asked Questions

Is LBM the same as Muscle Mass?

No, LBM includes organs, bones, and water in addition to muscle.

How accurate is this calculator?

This uses statistical formulas; for medical accuracy, DEXA scans or hydrostatic weighing are recommended.