Lean Mass Index Calculator

Calculate your Lean Mass Index (LMI) and lean body mass - a more accurate health indicator than BMI as it considers your body composition.

📋 Basic Information

🎯 Body Fat Calculation Method

Uses age, gender, and BMI to estimate body fat percentage.
Enter your known body fat percentage from DEXA, BodPod, or other measurements.
Enter your body fat percentage from professional measurement methods like DEXA scan, hydrostatic weighing, or BodPod.
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Lean Mass Index
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Lean Body Mass (kg)
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Fat Mass (kg)
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Body Fat Percentage
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Your lean mass index indicates healthy muscle mass for your height.

Lean Mass Index Reference Ranges

Men

Low Muscle Mass LMI < 17
Normal Muscle Mass LMI 17 - 19
High Muscle Mass LMI > 19

Women

Low Muscle Mass LMI < 15
Normal Muscle Mass LMI 15 - 17
High Muscle Mass LMI > 17

Understanding Lean Mass Index

Lean Mass Index (LMI) provides a more accurate assessment of body composition by measuring muscle mass relative to height, offering insights that BMI alone cannot provide.

🔬 What is LMI?

Lean Mass Index is calculated as lean body mass (muscle, bones, organs) divided by height squared. It helps distinguish between healthy muscle mass and excess fat, providing a clearer picture than BMI.

⚖️ LMI vs BMI

While BMI can't distinguish between muscle and fat, LMI specifically measures lean tissue. Athletes with high muscle mass will have accurate health assessments with LMI.

🎯 Health Benefits

Higher lean mass is associated with better metabolic health, stronger bones, improved insulin sensitivity, and reduced risk of chronic diseases and age-related muscle loss.

💪 Improving LMI

Resistance training, adequate protein intake, and progressive overload can help increase lean mass. Combine with cardiovascular exercise for optimal body composition.