Lean Body Mass Calculator

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Age

Height (inches)

Weight (lbs)

About Lean Body Mass

Lean Body Mass (LBM) is the total weight of your body minus all the weight due to your fat mass. In other words, LBM includes the weight of your organs, bones, muscles, and water in your body.

This calculator uses three different formulas to estimate your lean body mass:

Boer Formula
James Formula
Hume Formula

Each formula may give slightly different results due to their different methodologies.