Free Blood Type Compatibility Chart - Donor & Recipient Guide

Free blood type compatibility chart for all 8 ABO/Rh types. Instantly see who you can donate to, receive from, universal donor O-, and AB+ universal recipient.

Your type

O-

Universal donor

Donate to

8 of 8

Receive from

1 of 8

Your blood type

O-

Blood type O-

Universal donor

8

donate matches

1

receive matches

Can donate to

8 of 8

Recipients safe for O- red cells

O-

O+

A-

A+

B-

B+

AB-

AB+

O- is the universal donor because it lacks A, B, and Rh antigens, so donated O- red cells will not trigger an ABO or Rh immune response in any recipient.

Can receive from

1 of 8

Donors safe for O- transfusions

O-

O+

A-

A+

B-

B+

AB-

AB+

O- can receive only from O- donors because O- lacks A, B, and Rh antigens. If O- receives cells carrying A, B, or Rh antigens, the immune system may attack the foreign antigens and cause a dangerous transfusion reaction.

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Look up who can receive your blood type and who you can donate to across all eight ABO/Rh types — A+, A-, B+, B-, AB+, AB-, O+, and O-. Select a type to see donate-to and receive-from results together, with compatible types highlighted and incompatible ones greyed out. Short summaries explain universal donor O-, universal recipient AB+, and how A, B, and Rh antigens affect matching. The layout is mobile-first with a swipeable summary strip, tap-friendly picker, and quick navigation between sections. For education only — hospitals always cross-match blood before transfusion.

How to Use Blood Type Compatibility Chart

Pick your blood type

Tap your ABO/Rh type in the selector at the top. All eight standard types are supported. This is the fastest way to look up compatibility for your own type or one you are studying.

Read donate and receive results together

Both answers appear at once — no flipping between modes. On desktop, donate-to and receive-from panels sit side by side. On mobile, they stack with a summary strip and bottom navigation to jump between sections.

Use the visual compatibility grid

Each panel uses a mini grid where compatible types are highlighted and incompatible types are faded — easier than scanning a dense yes/no table.

Check match counts and universal labels

Match counts show how many of the eight types work for donation and transfusion. O- and AB+ also get universal donor and universal recipient labels when selected.

Expand the biological explanation on mobile

Tap "Why these matches?" below each grid on phone to read the antigen and Rh-factor reasoning. On desktop, the full explanation is visible under each panel — for example why O- can donate to every type or why A+ can donate only to A+ and AB+.

Calculator Features

🩸

Full ABO/Rh blood type chart

Covers A+, A-, B+, B-, AB+, AB-, O+, and O- with instant donor and recipient compatibility results.

🔄

Donate and receive in one view

See who you can donate to and who you can receive from at the same time — no mode switching required.

🟩

Visual blood type matching grid

Compatible blood types are highlighted; incompatible types are greyed out for fast scanning.

🧬

Universal donor and recipient labels

Highlights O- as the universal donor and AB+ as the universal recipient with plain-language explanations.

📊

Match counts at a glance

See how many of the eight blood types are compatible for donation and transfusion for any selected type.

📱

Mobile-first blood type lookup

Swipeable summary strip, 48px tap targets, collapsible explanations, and bottom nav for donate vs receive on phone.

🔒

Free, private, no sign-up

Runs entirely in your browser. No account, no health data upload, and no blood type information stored.

Complete Function List

All eight ABO/Rh types supported
Donate-to and receive-from results shown simultaneously
Visual grid with compatible and incompatible highlighting
Universal donor and universal recipient badges
Dynamic summaries for ABO and Rh matching rules
Mobile-first layout with summary strip and section navigation
Runs in the browser with no account required
Educational disclaimer for real-world transfusion safety

Common Calculations & Examples

Example 1: What blood types can O negative donate to?

Problem: You have O- blood and want to know who can safely receive your donation.

Steps:

Select O- in the blood type picker.
Read the "Can donate to" panel and match count.
Review the highlighted compatible types in the grid.

Result: All eight blood types are compatible because O- is the universal donor for red blood cell matching.

Explanation: O- red cells lack A, B, and Rh antigens, so they are less likely to trigger an immune reaction when given to recipients with other blood types.

Example 2: Who can AB positive receive blood from?

Problem: An AB+ patient needs to know which donor blood types are safe.

Steps:

Select AB+ in the picker.
Read the "Can receive from" panel.
Check whether all eight donor types are highlighted.

Result: AB+ can receive from every blood type because it is the universal recipient in standard red cell compatibility charts.

Explanation: AB+ already has A, B, and Rh antigens on its red cells, so it does not attack those antigens when they appear on donor cells.

Example 3: Can A positive donate to B positive?

Problem: You want to check whether A+ is a compatible donor for a B+ recipient.

Steps:

Select A+ as your blood type.
Look at the donate-to grid and see whether B+ is highlighted.
Read the summary explaining the antigen mismatch.

Result: B+ is incompatible because A+ can donate only to A+ and AB+.

Explanation: A+ carries A and Rh antigens that a B+ recipient may reject because B+ does not have the A antigen on its own red cells.

Example 4: Who can O negative receive blood from?

Problem: You need the strictest receive-from rules for an O- patient.

Steps:

Select O- in the picker.
Read the "Can receive from" panel.
Note that only one donor type is highlighted.

Result: O- can receive only from O- donors.

Explanation: Because O- lacks A, B, and Rh antigens, receiving cells with any of those antigens can cause a dangerous transfusion reaction.

Example 5: Can O positive donate to A negative?

Problem: You are checking Rh and ABO rules for an O+ donor and A- recipient.

Steps:

Select O+ in the blood type picker.
Check whether A- appears in the donate-to compatible list.
Read the Rh-factor note in the summary.

Result: A- is not a compatible recipient for O+ donation in this chart.

Explanation: O+ can donate to O+, A+, B+, and AB+ — all Rh-positive recipients. A- is Rh-negative and is not included in the O+ donate list.

What is blood type compatibility?

Blood type compatibility describes which donor and recipient ABO/Rh combinations are safe for transfusion. It depends on antigens on red blood cells and whether the recipient immune system would treat donor antigens as foreign.

What is the universal donor blood type?

O- is commonly called the universal donor because its red cells lack A, B, and Rh antigens and can be given to any of the eight standard ABO/Rh recipients in red blood cell compatibility rules.

What is the universal recipient blood type?

AB+ is commonly called the universal recipient because it can receive red cells from O-, O+, A-, A+, B-, B+, AB-, and AB+ in standard red cell matching charts.

Who can receive my blood type?

That depends on your ABO/Rh type and whether you are asking about donation or transfusion. Select your type in this chart to see who you can donate to. The receive-from panel shows whose blood you can safely receive if you are the patient.

Who can I donate blood to with O negative?

O- can donate to all eight types: O-, O+, A-, A+, B-, B+, AB-, and AB+. Its red cells lack A, B, and Rh antigens, which is why it is called the universal donor.

Who can O negative receive blood from?

O- can receive only from O- donors. It cannot safely receive from Rh-positive or A/B-positive donor red cells under standard matching rules.

Can A positive donate to B positive?

No. A+ can donate only to A+ and AB+. B+ is not a compatible recipient because A+ red cells carry the A antigen, which B+ recipients do not have on their own cells.

Can O positive donate to A negative?

No. O+ can donate to O+, A+, B+, and AB+ — all Rh-positive recipients. A- is Rh-negative and is not included in the O+ donation list.

Why can AB positive donate to only AB positive?

AB+ red cells carry A, B, and Rh antigens. Recipients without all three antigens may mount an immune response, so AB+ donation is limited to other AB+ recipients in this model.

Does Rh factor matter in blood transfusion compatibility?

Yes. Rh-positive donor red cells are generally not given to Rh-negative recipients in routine matching because the recipient may form anti-Rh antibodies. That is why O- and other Rh-negative types often have stricter receive-from rules.

What is the difference between ABO and Rh blood types?

ABO refers to A and B antigens on red cells: type A, B, AB, or O. Rh is a separate D antigen: positive if present, negative if absent. Together they form the eight common types such as A+, A-, O+, and O-.

Is this blood type chart the same as a hospital cross-match?

No. This is an educational red blood cell compatibility chart. Hospitals perform cross-matching, antibody screening, component selection, and clinical review before any transfusion.

What blood types can A positive donate to?

A+ can donate red cells to A+ and AB+ only. It cannot donate to O types, B types, or A- because those recipients may lack the A and/or Rh antigens on A+ donor cells.

Can B negative donate to B positive?

Yes. B- can donate to B-, B+, AB-, and AB+ in this red blood cell compatibility chart. B+ is compatible because it already has the B antigen and can receive Rh-negative donor cells under standard matching rules.

Is my blood type stored or sent anywhere?

No. The tool runs in your browser and does not upload your blood type selection. Nothing is saved unless your browser itself stores general site data outside this calculator.

Complete blood type compatibility table (all 8 types)

Reference table for red blood cell donate-to and receive-from rules. Use alongside the interactive tool above. O- (O negative): Donate to O-, O+, A-, A+, B-, B+, AB-, AB+. Receive from O- only. O+ (O positive): Donate to O+, A+, B+, AB+. Receive from O+, O-. A- (A negative): Donate to A-, A+, AB-, AB+. Receive from A-, O-. A+ (A positive): Donate to A+, AB+. Receive from A+, A-, O+, O-. B- (B negative): Donate to B-, B+, AB-, AB+. Receive from B-, O-. B+ (B positive): Donate to B+, AB+. Receive from B+, B-, O+, O-. AB- (AB negative): Donate to AB-, AB+. Receive from AB-, A-, B-, O-. AB+ (AB positive): Donate to AB+ only. Receive from all eight types: O-, O+, A-, A+, B-, B+, AB-, AB+. These rules apply to red blood cells. Plasma matching differs, and hospitals confirm every unit with cross-matching before transfusion.

How ABO blood type matching works

Type A red cells carry A antigens, type B carries B antigens, type AB carries both, and type O carries neither. A recipient can attack donor antigens it does not already have. That is why an O recipient cannot safely receive A or B donor cells, while an AB recipient can receive A, B, or O donor cells in red cell matching.

Rh-positive vs Rh-negative compatibility

The Rh factor is independent of ABO. Rh-positive blood contains the D antigen; Rh-negative blood does not. Giving Rh-positive red cells to an Rh-negative recipient can cause sensitization and future transfusion risk, which is why Rh-negative patients are usually matched to Rh-negative donors.

Universal donor and recipient explained

O- lacks A, B, and Rh antigens on its red cells, so it is used as the universal donor in emergency education. AB+ already carries A, B, and Rh antigens, so it is described as the universal recipient. See the reference table above for every type.

Red blood cells vs plasma compatibility

Most public blood type charts — including this tool — focus on red blood cell transfusion rules. Plasma compatibility can differ because antigens are dissolved in plasma rather than on the cell surface. Always specify which component you mean when comparing charts.

Why real transfusion is more complex than a chart

Clinical transfusion also considers antibodies already present, component type, patient history, pregnancy-related sensitization, rare antigens, and local blood bank policy. A compatibility chart is a learning foundation, not a substitute for laboratory cross-matching.

Free Blood Type Compatibility Chart - Donor & Recipient Guide

O-

8 of 8

1 of 8

Blood type O-

8

1

Can donate to

Can receive from

How to Use Blood Type Compatibility Chart

Pick your blood type

Read donate and receive results together

Use the visual compatibility grid

Check match counts and universal labels

Expand the biological explanation on mobile

Calculator Features

Full ABO/Rh blood type chart

Donate and receive in one view

Visual blood type matching grid

Universal donor and recipient labels

Match counts at a glance

Mobile-first blood type lookup

Free, private, no sign-up

Complete Function List

Common Calculations & Examples

Example 1: What blood types can O negative donate to?

Example 2: Who can AB positive receive blood from?

Example 3: Can A positive donate to B positive?

Example 4: Who can O negative receive blood from?

Example 5: Can O positive donate to A negative?

Tips for Using Blood Type Compatibility Chart

Frequently Asked Questions

Understanding Blood Type Compatibility Chart

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