Health & Fitness
Lean Body Mass Calculator
Calculate lean body mass using weight, height, and sex.
Formulas and edge cases are reviewed against authoritative references before publication. For methodology, editorial standards, or corrections, use the links below.
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.
Related tools
About this tool
Inputs
- Weight
- Height
- Sex
Results
- Lean body mass
Whether you are planning ahead or double-checking existing numbers, the Lean Body Mass Calculator delivers instant answers from the figures you provide. Fill in weight, height and sex and the tool handles the rest, showing you lean body mass within moments. Body composition, metabolism, and vital signs interact in complex ways that a single number cannot capture. Caloric needs combine basal metabolism with an activity multiplier.
People frequently need to calculate lean body mass using weight, height, and sex but lack a quick way to do it — this tool fills that gap. Athletes and pregnant individuals may fall outside standard reference ranges without any health concern. No. Lean body mass includes muscle, bone, organs, and water. Results are rounded for display; the underlying computation retains full precision.