Blood Type Compatibility Checker
See which blood types can give red cells and plasma to which — ABO and Rh compatibility for transfusions, explained simply.
For general information only — not medical advice. Results are estimates; talk to a doctor or qualified health professional about your own health.
How to use
- 1Choose your blood type.
- 2See who you can donate red cells to and receive them from, plus plasma compatibility.
How it's calculated
Red cells: O can give to all ABO groups, AB can receive from all; Rh-negative can give to Rh-positive, not the reverse. Plasma compatibility is the opposite for ABO (AB plasma is universal).
Frequently asked questions
Who is the universal donor?
O-negative for red cells — it can be given to anyone in an emergency. AB is the universal plasma donor.
Who is the universal recipient?
AB-positive can receive red cells from all ABO and Rh types.
Does this replace cross-matching?
No. Hospitals always test donor and patient blood before a transfusion.