Interactive Compatibility Calculator
Select a blood type to view who they can give blood to and receive from:
Can Give Blood To:
Can Receive Blood From:
Details & Rarity
Rarity: approx. 7% of population (Universal Donor)
O-Negative is the universal donor type. In emergency situations, O-Negative blood can be transfused to any patient regardless of their blood type, making it highly valuable to blood banks and hospitals.
Register & Display Your Type
Join the PBDA community as a donor and show your blood compatibility on your profile pass!
Key Blood Facts
O-Negative is the Universal Red Cell
Only 7% of people have O-Negative, but it is the most requested type in emergency rooms during severe accidents.
AB-Positive is the Universal Plasma
While AB-Positive red cells can only be given to AB+ patients, AB+ plasma can be received safely by any patient of any blood type.
Rh Factor Matters
The positive (+) or negative (-) signifies the presence or absence of the Rh protein on red blood cells.
What is your type?
Knowing your blood type helps clinics and hospitals match you with recipients quickly. If you are unsure of your blood type, you can discover it during your first voluntary blood donation check!