What is lean body mass?

LBM = total body weight minus body fat weight. It includes muscle, bone, water, and organs. It is used to calibrate protein intake and medication dosing.

Which formula does this use?

This calculator uses the Boer formula (1984), which is widely used in clinical settings. The Janmahasatian formula is more accurate but requires additional measurements.

Lean Body Mass Calculator

Calculate your lean body mass from weight, height, and sex using the Boer formula.

Embed this tool on your site

<iframe src="https://abracalc.com/calculator/lean-body-mass-calculator/embed.html" width="340" height="320" style="border:1px solid #e4e7ec;border-radius:12px" loading="lazy"></iframe>

How to use this tool

Enter weight, height and sex in the fields above.
Results update instantly as you type — or click Calculate.
Read your lean body mass and the full breakdown beneath it.

Lean body mass is your total weight minus fat. The Boer formula uses height and weight to give a quick estimate.

Frequently asked questions

What is lean body mass?: LBM = total body weight minus body fat weight. It includes muscle, bone, water, and organs. It is used to calibrate protein intake and medication dosing.
Which formula does this use?: This calculator uses the Boer formula (1984), which is widely used in clinical settings. The Janmahasatian formula is more accurate but requires additional measurements.

References & sources

Wikipedia: Lean body mass