Blood type compatibility chart: who can give to whom?

⁦AB+⁩ can receive from all 8 blood types

Universal recipient: it can receive red cells from every type. AB plasma can be given to anyone.

Become a donor

Matches shown are for red blood cells (whole blood). Plasma and platelets follow other rules, and hospitals always cross-match before a transfusion.

The full compatibility chart

Rows are donors, columns are patients. A tick means the donor's red cells can be given to that patient.

O-
O- is the universal donor

Its red cells can be given to every patient, which is why emergency rooms keep it ready.
Who can it help?
AB+
AB+ is the universal recipient

A patient with AB+ can receive red cells from any of the 8 blood types.
Who can help it?
AB
Plasma works the other way round

For plasma, AB is the universal donor and O can only give to O.

Can I donate blood today?

Answer a few short questions and see whether you can donate now, and if not, why and when.
When can I donate again?

Enter your last donation date and see the day you can donate again.
Child’s blood type predictor

Pick both parents’ blood types to see which types the child can and cannot have.

Sign up as a donor and we will tell you when a patient near you needs your blood type.