Blood Type Compatibility Calculator

Free check blood type compatibility for transfusions. Get instant, accurate results with our easy-to-use calculator.

Blood Types

Results

Select blood types to check compatibility

About Blood Type Compatibility

  • • O- is the universal donor
  • • AB+ is the universal recipient
  • • Rh factor must match (Rh- can receive Rh-, Rh+ can receive both)
  • • ABO compatibility is also required