Lean Body Mass Calculator
Calculate your lean body mass from weight and body fat percentage. Free LBM calculator using Boer, James, and Hume formulas.
Body Composition (BF% Method)
Body Fat % Method
Boer Formula (Male)
LBM = 0.407 × W + 0.267 × H − 19.2 (W in kg, H in cm)
About Lean Body Mass Calculator
Calculate your lean body mass (muscle, bone, water, organs) using both the body fat percentage method and the Boer formula. Lean body mass is your total weight minus fat mass, and is useful for setting nutrition and fitness goals.
How to Use Lean Body Mass Calculator
Enter your values
Open Lean Body Mass Calculator and enter the values you want to calculate or convert.
Select units or options
Choose the input and output units, formats, or calculation parameters.
View results instantly
Results are calculated in real-time as you type — no submit button needed.
Copy or use the result
Copy the calculated result or use it directly in your work.
Frequently Asked Questions
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