Lean Body Mass Calculator

Calculate your lean body mass using Boer or Hume formulas. Estimate muscle mass and body fat percentage for fitness assessment.

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LBM Result

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What is LBM?

Lean Body Mass is the total weight of your body minus body fat. It includes muscle, bones, organs, and water content.

Why Calculate LBM?

LBM is crucial for medication dosing, metabolic assessment, and fitness tracking. It's a better indicator than total weight for health monitoring.

Medical Use

Anesthesiologists use LBM to calculate proper medication doses, especially for opioids and propofol in surgical procedures.

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Boer Formula (1984)

Men: LBM = (0.407 × W) + (0.267 × H) − 19.2
Women: LBM = (0.252 × W) + (0.473 × H) − 48.3

Where W = weight in kg, H = height in cm

Hume Formula (1966)

Men: LBM = (0.32810 × W) + (0.33929 × H) − 29.5336
Women: LBM = (0.29569 × W) + (0.41813 × H) − 43.2933

Where W = weight in kg, H = height in cm

Medical Reference

Wikipedia Reference

This calculator implements the Boer and Hume formulas for Lean Body Mass calculation as described in the Wikipedia article.

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Author

Dr. Beltrán J.F.