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Allowable Blood Loss Calculator
Calculate Maximum Allowable Blood Loss (MABL) for surgical procedures
Clinical Formula: $\text{MABL} = \text{EBV} \times \frac{\text{Initial Hct} - \text{Minimum Acceptable Hct}}{\text{Average Hct}}$, where Estimated Blood Volume ($\text{EBV}$) depends on patient weight and age/gender category. Enter patient parameters below.
Patient Parameters Input
Calculation Results
⚠️ Not medical advice. For educational and surgical planning support only. Always coordinate blood transfusion thresholds and fluid management with an anesthesiologist or surgical team.