Lean Body Mass Calculator
Estimate how much of your body weight is lean tissue versus fat mass using your total weight and body fat percentage.
%
Lean body mass
147.6 lb
Fat mass
32.4 lb
Body fat
18.0%
How to Use
- Enter your current body weight.
- Add your estimated body fat percentage.
- Review the lean mass and fat mass breakdown.
- Use the result as a rough planning tool for fitness and nutrition goals.
Frequently Asked Questions
What is lean body mass?
Lean body mass is your total body weight minus fat mass. It includes muscle, bone, organs, and water.
How accurate is this?
It is only as accurate as your body fat percentage estimate. Better body fat measurements produce better lean mass estimates.
Why is lean mass useful?
It can help with tracking body composition changes and planning nutrition or training targets.
Is lean mass the same as muscle mass?
No. Muscle mass is only one part of lean body mass.