Who can B positive (B+) donate blood to?
Red blood cells from a B positive (B+) donor can be given to: B+, AB+. The blood centre tests and cross-matches every unit before use.
B positive (B+) blood group: who can donate, who can receive
A simple guide for people who are B positive (B+), or looking for B positive (B+) blood. It explains compatibility and how to request blood. Final matching is always done by the hospital or blood centre.
Sign in to request bloodB positive (B+) can donate red blood cells to
Red blood cells from a B positive (B+) donor can be given to these groups, after the blood centre tests and cross-matches the blood: B+, AB+.
- B+
- AB+
B positive (B+) can receive red blood cells from
A B positive (B+) patient can receive red blood cells from these groups, after testing and cross-matching: B+, B-, O+, O-.
- B+
- B-
- O+
- O-
B positive (B+) and plasma
Plasma follows different rules from red cells, and Rh does not matter for it. Plasma from a B positive (B+) donor can be given to: B, O. A blood centre decides what is suitable.
How to request B positive (B+) blood
- Ask the treating doctor or hospital blood bank first, and confirm the exact blood group and number of units needed.
- Post a request in The Life Savers app with the blood group, hospital and a contact number. Registered voluntary donors who match may be notified and can choose to respond.
- Keep the hospital informed. We cannot guarantee that a donor will be available, so in an emergency also contact a blood bank or emergency services.
Are you B positive (B+)? Become a voluntary donor
Register in the app to be notified when a matching request is posted. Blood group does not decide whether you can donate: the blood centre checks your health on the day.
Common questions
Who can give blood to a B positive (B+) patient?
A B positive (B+) patient can receive red blood cells from: B+, B-, O+, O-. The hospital confirms the match with a cross-match test.
How do I find a B positive (B+) blood donor?
Post a blood request in The Life Savers app with the blood group, hospital and contact number. Matching voluntary donors may be notified and can choose to respond. We cannot guarantee a donor, so also contact the hospital blood bank.
Can I donate if I am B positive (B+)?
Your blood group does not decide this. The blood centre checks your health, weight, haemoglobin and recent history on the day. Read our blood donation guide for general eligibility.
Why install The Life Savers app
The website helps you look things up. The app helps when time matters, because it can reach you even when your browser is closed.
- Blood request alertsGet a notification when a request matching your blood group is posted, and respond in one tap.
- Post a request in secondsSave your details once, then post a request with the blood group, hospital and contact number whenever you need to.