Lean Body Mass Calculator
Calculate your lean body mass and understand your body composition
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Fill in your information to calculate your lean body mass
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References
- World Health Organization (WHO) - BMI Classification
- National Institutes of Health (NIH) - Clinical Guidelines
- Centers for Disease Control and Prevention (CDC) - Healthy Weight
About Lean Body Mass Calculator
How It Works
Lean body mass (LBM) is calculated using the Boer formula, which estimates total body weight minus fat mass. LBM includes muscle, bone, organs, and water weight. This measurement is crucial for understanding your metabolic health.
How to Interpret Results
Your LBM represents the metabolically active tissue in your body. Higher LBM generally means a higher resting metabolic rate. Tracking LBM changes helps distinguish fat loss from muscle loss during weight management.
Health Tips
Preserve lean mass by consuming adequate protein (1.2-2.0g per kg bodyweight) and engaging in resistance training. LBM naturally declines with age, making preservation increasingly important for long-term health.
Limitations
LBM estimates vary by calculation method. Hydration levels and recent exercise can temporarily affect measurements. DEXA scans provide more accurate results than estimation formulas.
Last reviewed: July 16, 2026
Medical Disclaimer: This calculator is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or qualified health provider with any questions regarding your health.