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Lean body mass (LBM) calculator

Your lean body mass from three formulas (Boer, James, Hume) and your estimated body fat.

  • Free
  • No sign-up
  • Works on any device

About Lean body mass (LBM) calculator

Calculate lean body mass, your weight minus fat, using the Boer, James and Hume formulas, which use height, weight and sex. Seeing three results shows the estimate range. It also gives an estimated body fat share. Useful for setting protein targets and tracking changes while dieting.

How to use Lean body mass (LBM) calculator

  1. Enter your numbers above.
  2. The result updates instantly as you type.
  3. Change any value to compare different cases.

Why use this tool?

Also known as

Frequently asked questions

What counts as lean body mass?

Everything except fat: muscle, bone, organs, skin and water. Muscle gain raises it, while fat loss leaves it mostly unchanged.

Is Lean body mass (LBM) calculator free?

Yes. Lean body mass (LBM) calculator on Toolipedia is free to use, with no sign-up and no watermark.

Is it safe to use?

Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.

Does it work on my phone?

Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.

Do I need an account?

No. Just open the page and use the tool. There's no sign-up and no email needed.

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