This blood type compatibility chart shows who each blood type can donate to and receive from (red cells). O− is the universal donor; AB+ is the universal recipient.
| Blood type | Can donate to | Can receive from |
|---|---|---|
| O− | Everyone (universal donor) | O− |
| O+ | O+, A+, B+, AB+ | O−, O+ |
| A− | A−, A+, AB−, AB+ | O−, A− |
| A+ | A+, AB+ | O−, O+, A−, A+ |
| B− | B−, B+, AB−, AB+ | O−, B− |
| B+ | B+, AB+ | O−, O+, B−, B+ |
| AB− | AB−, AB+ | O−, A−, B−, AB− |
| AB+ | AB+ | Everyone (universal recipient) |
For red blood cell transfusions. Plasma compatibility is the reverse. Always confirmed by medical cross-matching.