Lean Body Mass Index is a verified health & fitness calculation tool on Calcify. Calculate Lean Body Mass (LBM) and Fat-Free Mass Index (FFMI) using the Boer clinical equation. All calculations execute locally in your browser with multi-currency support, visual breakdowns, and white-label client exports.
Fat-Free Mass Index (FFMI): 18.8 kg/m²
Boer Male LBM = 0.407·W + 0.267·H - 19.2; Female LBM = 0.252·W + 0.473·H - 48.3; FFMI = LBM / H(m)²
Example Inputs: Body Weight (kg): 75 kg · Height (cm): 176 cm · Biological Sex: male
Example Output: Estimated Lean Body Mass (LBM): 58.3 kg (77.8%) (Fat-Free Mass Index (FFMI): 18.8 kg/m²)
The Lean Body Mass Index on Calcify applies the verified mathematical formula: Boer Male LBM = 0.407·W + 0.267·H - 19.2; Female LBM = 0.252·W + 0.473·H - 48.3; FFMI = LBM / H(m)². Every input is validated in real time with multi-currency formatting to ensure zero rounding or division errors.
Estimates fat-free skeletal muscle, bone, organ, and water weight.
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