Lean Body Mass Calculator
Estimate your lean body mass (LBM) using the Boer formula. Enter your sex, height and weight to calculate lean mass and estimated fat mass.
| Body Details | Enter Value |
|---|---|
| Sex | |
| Units | |
| Weight | |
| Height (cm) |
Enter your details to estimate lean body mass.
How to Use the Lean Body Mass Calculator
Enter the requested body measurements to estimate lean body mass, which represents body weight excluding estimated fat mass.
Practical Example
If someone weighs 80 kg and an equation estimates 20 kg of fat mass, estimated lean body mass is about 60 kg.
Factors That Affect the Result
Different formulas use different inputs and can produce different results. Hydration, muscle mass, body shape and measurement accuracy also affect estimates.
Frequently Asked Questions
Is lean body mass the same as muscle mass?
No. Lean body mass includes muscle, bone, organs and body water.
Is the estimate exact?
No. It is formula-based.
Can I use it with body fat estimates?
Yes, as a general comparison tool.