How do you find out your blood type without a blood test?

Expensive option: Genetic testing using a buccal swab can determine a person's blood type, but this is an awfully expensive way to do the test that can usually be done inexpensively on a drop of blood from a finger stick.

Donate blood to the : If you donate blood to the red cross, you will save someone's life, get a free blood test which will tell you what your blood type is. Save a life.