Lean Body Mass Calculator
Calculate your fat-free body mass for fitness and health assessment
Calculate Lean Body Mass
Lean Body Mass Results
Example Calculations
Example 1: Male, 75kg, 180cm
Boer Formula: 0.407 × 75 + 0.267 × 180 - 19.2 = 59.4 kg
LBM Percentage: 59.4 ÷ 75 × 100 = 79.2%
Status: Healthy range (75-90%)
Example 2: Female, 60kg, 165cm
Boer Formula: 0.252 × 60 + 0.473 × 165 - 48.3 = 44.8 kg
LBM Percentage: 44.8 ÷ 60 × 100 = 74.7%
Status: Healthy range (68-90%)
Healthy LBM Ranges
Men
75-90% of total body weight
Women
68-90% of total body weight
Athletes
May exceed 90% due to high muscle mass
Calculation Methods
Boer Formula
Most accurate predictive method based on height, weight, and sex
Body Fat Method
Direct calculation when body fat % is known
Why Calculate LBM?
Understanding Lean Body Mass
What is Lean Body Mass?
Lean Body Mass (LBM) represents the weight of your body minus all the fat. It includes muscles, bones, organs, blood, skin, and everything else that isn't fat tissue. LBM is also called fat-free mass and is a crucial metric for understanding body composition.
Why is LBM Important?
- •Better indicator of health than total weight
- •Helps track muscle loss during weight loss
- •Important for calculating metabolic rate
- •Used in medical settings for drug dosing
About the Boer Formula
Development
Developed through studies of body composition in healthy adults
Accuracy
Considered the most accurate predictive formula available
Sex Differences
Different coefficients account for natural body composition differences
Medical Disclaimer: This calculator provides estimates for general fitness and health information. For medical applications or precise body composition analysis, consult healthcare professionals and consider methods like DEXA scanning.