Work out blood transfusion volume instantly with clear inputs, formula shown and shareable results.
Uses the paediatric rule that 3 to 5 mL/kg of packed red cells raises haemoglobin by about 1 g/dL, and converts the total into adult unit equivalents.
Transfusion volume
Volume (mL) = weight (kg) x desired Hb rise (g/dL) x factor (3-5 mL/kg per g/dL)
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
About 1 g/dL in a typical 70 kg adult who is not bleeding.
Restrictive single-unit transfusion with reassessment is now the standard approach in stable patients.