Transfusion Volume Calculator
Enter patient weight, current hemoglobin, and target hemoglobin to instantly calculate the required pRBC transfusion volume in milliliters.
Patient Parameters
g/dL
g/dL
Enter patient parameters and click
Calculate Volume to see results.
Required pRBC Volume
mL
Packed Red Blood Cells (pRBCs)
Calculation Breakdown
Weight
Hgb Deficit
Factor
3
Formula
Current Hgb: g/dL
Target Hgb: g/dL
Scale: 0–20 g/dL
For educational and reference use only. All transfusion decisions must be made by a qualified healthcare professional.
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Summary
Enter patient weight, current hemoglobin, and target hemoglobin to instantly calculate the required pRBC transfusion volume in milliliters.
How it works
- Enter the patient's body weight in kilograms or pounds.
- Enter the current (actual) hemoglobin level in g/dL.
- Enter the desired (target) hemoglobin level in g/dL.
- The calculator applies Volume = Weight (kg) × (Target Hgb − Actual Hgb) × 3.
- The required pRBC transfusion volume is displayed instantly in milliliters.
Use cases
- Estimating pRBC transfusion volume for anemic patients in the hospital.
- Calculating blood requirements before elective surgery.
- Bedside reference for nurses and physicians managing transfusion therapy.
- Pediatric transfusion planning where precise volumes are critical.
- Medical education and clinical pharmacology study.
- Cross-checking manually calculated transfusion orders.
Frequently Asked Questions
Last updated: 2026-07-01 ·
Reviewed by Nham Vu