Lean Body Mass Calculator
Lean body mass is everything in your body that isn't fat — muscle, bone, organs and water. This calculator estimates it from your weight and height.
Show solution steps
What is the Lean Body Mass Calculator?
Lean body mass (LBM) is your total weight minus body fat. Tracking it helps you tell whether weight changes come from muscle or fat, which matters for fitness and nutrition.
How to Calculate
The Boer formula: men LBM = 0.407×weight + 0.267×height − 19.2; women LBM = 0.252×weight + 0.473×height − 48.3, with weight in kg and height in cm.
Formula
LBM (men) = 0.407×weight + 0.267×height − 19.2
How to Use
- Enter your details in the fields above.
- The result updates instantly as you type.
- Use Copy, Print or Download PDF to save your result.
Frequently Asked Questions
Why does lean mass matter?
Muscle is metabolically active u2014 more lean mass raises your resting calorie burn and supports strength, mobility and healthy ageing.
Was this calculator helpful?
Thanks for your feedback!