Our lean body mass calculator uses scientific formulas to estimate your lean body mass based on weight, height, and gender. The calculation applies validated formulas including Boer, James, and Hume methods to provide accurate estimates of lean body mass and body composition.

Understanding Lean Body Mass

Lean body mass includes all non-fat tissues: skeletal muscle, organs, bones, and water. It's a key indicator of metabolic health, as lean tissue burns more calories at rest than fat tissue. Higher lean body mass is associated with increased strength, better metabolic health, and improved longevity.

• Includes muscle, bones, organs, and water (about 70% of LBM is water)
• Higher LBM increases basal metabolic rate and calorie burn
• Decreases naturally with age (sarcopenia) after age 30
• Can be increased through resistance training and proper nutrition
• Ideal ranges: 75-90% of total weight for men, 70-85% for women
• Important for maintaining strength, mobility, and metabolic health

Sources & References