Lean Body Mass Calculator
Estimate your lean body mass (LBM) based on weight, height, gender, and age using the Boer formula.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Lean Body Mass Calculator
- Enter your weight in kilograms (kg) — e.g., 70.0.
- Enter your height in centimeters (cm) — e.g., 175.0.
- Enter your age in years — e.g., 30.
- Select your gender from the dropdown (Male or Female).
- Click "Calculate LBM".
The result shows your estimated lean body mass in kg, using the Boer formula. If the value is negative, it will display as 0 kg. All inputs must be positive numbers; the form validates them automatically.
Previous Results
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Frequently Asked Questions
Lean body mass (LBM) is the weight of your body minus fat. It includes muscle, bone, organs, and water.
This calculator uses the Boer formula, which differs for men and women based on weight and height.
LBM helps estimate metabolic rate, guide nutrition, and track fitness progress.
