Lean Body Mass Calculator
Calculate your lean body mass and understand your body composition.
0 kg
Using formula for male
Muscle Mass
0 kg
Fat Mass
0 kg
Body Fat %
0%
Body Composition
Formula Comparison
Understanding Lean Body Mass
Lean Body Mass (LBM) is your total body weight minus body fat. It includes muscles, bones, organs, and water. LBM is more useful than total weight for fitness tracking.
Track your LBM instead of total weight to monitor muscle gain during training. Gaining muscle while losing fat may not show on the scale but will improve your LBM.
Ideal Body Fat Ranges
Men
Athletes: 6-13%
Fitness: 14-17%
Average: 18-24%
Women
Athletes: 14-20%
Fitness: 21-24%
Average: 25-31%
Last Updated: February 2026
Disclaimer: Formula-based estimates are approximations. For accurate body composition, consider DEXA scans or hydrostatic weighing.
About the Lean Body Mass Calculator
This lean body mass calculator estimates health and fitness metrics from your personal inputs. Calculate lean body mass and fat-free mass using height, weight, and body fat percentage.
Use for personal wellness tracking and education. Consult a healthcare provider for medical advice.
Adjust the inputs above to model your specific scenario with the Lean Body Mass Calculator.
Explore More
Related Calculators
Body Fat Calculator
Estimate body fat using the US Navy tape measure method.
Bra Size Calculator
Calculate bra band and cup size from measurements with US, UK, EU, AU & FR conversion.
BSA Calculator
Calculate body surface area using multiple formulas.
Ideal Weight Calculator
Find your ideal weight using Devine and other formulas.
LBM Calculator
Calculate lean body mass and fat-free mass.
WHR Calculator
Calculate waist-to-hip ratio for health risk assessment.