Lean Body Mass Calculator
Calculate your lean body mass (LBM) using the Boer, James, and Hume formulas. LBM is your total weight minus your fat mass.
Your Measurements
Enter your weight and height to estimate your Lean Body Mass
What is Lean Body Mass?
Lean Body Mass (LBM) is your total weight minus your fat mass. It includes your bones, organs, muscles, and water weight. Tracking LBM helps you ensure you're losing fat rather than muscle during a diet.
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Interactive Google Health Web Stories & Visual Guides
Explore fast, mobile-first visual stories on BMI, Calorie Deficit, TDEE, Macros, Sleep Cycles, and Healthy Habits.
Evidence-Based Clinical Formulations
All biometrics, body composition, and caloric computations adhere to the Mifflin-St Jeor, Harris-Benedict, and U.S. Navy standards referenced by the Centers for Disease Control and Prevention.
Cardiovascular & Nutrition Tips
Target heart rates, daily sodium ceilings, and macronutrient distributions align with the American Heart Association (AHA) and USDA Dietary Guidelines for Americans.
Practical Health Takeaways
Pair your calculation with structured sleep (7-9 hrs), balanced hydration (half body weight in oz), and a 500 kcal sustainable deficit for healthy body composition management.