How to find out your blood type for free. One way to find out your blood type is to donate blood. If you donate to community blood supplies, ask the staff if theyll be able to tell you your blood type. Many donation centers are able to provide that information.

How do I find out my blood type from results?

The test to determine your blood group is called ABO typing. Your blood sample is mixed with antibodies against type A and B blood. Then, the sample is checked to see whether or not the blood cells stick together. If blood cells stick together, it means the blood reacted with one of the antibodies.

How common is my blood type?

O-negative (6.6 percent) B-positive (8.5 percent) A-positive (35.7 percent) O-positive (37.4 percent)

Do you have to pay to know your blood type?

But youll have to specifically ask for it, since its not part of routine exams or wellness checks. And insurance providers may not cover it, unless theres a medical reason for the test, she adds. So patients will most likely have to pay out of pocket if they request blood work solely to discover their blood type.