Lean Body Mass Calculator

Calculate your Lean Body Mass (LBM) — which is everything in your body except for fat (muscles, bones, organs, water). We use the highly regarded Boer formula.

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How to Use

  1. 1

    Step 1

    Select your gender.

  2. 2

    Step 2

    Choose your preferred unit system (Metric or Imperial).

  3. 3

    Step 3

    Enter your total body weight.

  4. 4

    Step 4

    Enter your height.

  5. 5

    Step 5

    Click Calculate to see your Lean Body Mass and estimated body fat percentage.

Frequently Asked Questions

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