Health & Fitness
Lean Body Mass Calculator
Calculate lean body mass using weight, height, and sex.
Created and maintained by: CalcTago Editorial TeamLast updated: 2026-02-13
Formulas and edge cases are reviewed against authoritative references before publication. For methodology, editorial standards, or corrections, use the links below.
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Frequently asked questions
What is lean body mass?
Lean body mass is your total weight minus body fat.
Which formula is used?
This calculator uses the Boer formula for lean body mass.
Is this the same as muscle mass?
No. Lean body mass includes muscle, bone, organs, and water.
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About this tool
This Lean Body Mass Calculator turns your inputs into practical results. Provide Weight, Height, and Sex to calculate Lean body mass.
Adjust values to compare scenarios and see how sensitive the result is. The calculation uses the numbers as entered, so double-check units and expect small differences from rounding in the displayed totals.