Lean Body Mass (LBM) Calculator (Boer & James Clinical Formulas)
Calculate your Lean Body Mass (LBM in kg and lbs), Fat Mass, and Lean Percentage using the gold-standard Boer and James pharmacological equations for clinical drug dosing and athletic nutrition planning.
Lean Body Mass (Boer LBM in kg)
Calculator Inputs
Lean Body Mass (Boer LBM in kg)
Estimated Fat Mass (kg)
Lean Body Mass Percentage
Lean Body Mass vs Fat Mass Composition
Standard clinical equations utilized in pharmacology, anesthesia, and sports physiology.
This tool is a mathematical wellness and fitness estimation model for general educational guidance only. The results do not constitute medical diagnosis, clinical advice, or treatment plans. Always consult a qualified physician or certified dietitian before starting any dietary regimen, exercise program, or making health decisions.
Calculation Methodology
Boer Formula: Men LBM (kg) = (0.407 * Weight) + (0.267 * Height) - 19.2. Women LBM (kg) = (0.252 * Weight) + (0.473 * Height) - 48.3.
Frequently Asked Questions
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