Coach Track

Lean Body Mass Calculator

Estimate your lean body mass

Estimate lean body mass and fat mass from height, weight, and the Boer equation.

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Your Lean mass result

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Method preview

Boer lean body mass equation. The result is an estimate and includes its limitations.

01

What is Lean Body Mass?

Lean Body Mass (LBM) is your total weight minus body fat. It includes muscle, bones, organs, and water.

02

Calculation Method

We use the Boer population equation to estimate lean body mass from height, weight, and the sex-specific equation selected.

03

Using the Results

The estimate can help you follow broad body-composition trends. It is not a direct measurement and should not be used for medication dosing.

Method and sources

Method: Boer lean body mass equation.

Supported population: Adults within the body-size range represented by the Boer equation.

Assumptions:
  • Height and weight are current
  • The selected sex-specific equation is appropriate
Lean body mass equation notesCoach Track methodology
Reviewed 2026-07-16
Read the complete methodology

Frequently asked questions

How is the Lean mass estimate calculated?

Boer lean body mass equation.

What are the limitations of this Lean mass estimate?

The result is a population-based estimate and is not a substitute for DEXA or another direct body-composition assessment.