Select your blood type and your partner's to check compatibility scores. See love, friendship, and work compatibility at a glance.
Choose your blood type from A, B, O, or AB. If you're unsure, you can check your health checkup results or blood donation records.
Select the blood type of the person you'd like to check compatibility with. This works for romantic partners, friends, colleagues, or anyone.
Press the Check Compatibility button to see your overall score, plus love, friendship, and work compatibility scores. Strengths, cautions, and relationship tips are also provided.
Discover romantic compatibility through blood types! Understand personality differences and build a better relationship.
Check friendship compatibility by blood type and improve communication with your friends.
Understand work styles by blood type to enhance teamwork and reduce conflicts at the office.
Learn about the personality traits of your date's blood type in advance and prepare conversation topics.
Blood type personality theory and compatibility are not scientifically verified. Popularized in Japan in the 1970s and widely embraced in Korea, academic studies have not found significant correlations between blood types and personality traits. We recommend enjoying this as fun cultural content.
Absolutely not. Compatibility scores are just fun reference points. Real relationship quality is determined by communication, understanding, and effort. In fact, discussing areas with low scores can become opportunities to improve your relationship.
Same blood types may understand each other easily, but they also share similar weaknesses. For example, two Type B's respect freedom but may lack direction, while two Type AB's share deep understanding but may lack emotional expression.
Blood type compatibility generally does not consider the RH factor. Blood type personality theory is based on the ABO blood type system. While the RH factor is important in medical classification, it is not considered relevant to personality or compatibility.
Blood type personality theory traces back to Professor Takeji Furukawa's 1927 research in Japan. It was later popularized by author Masahiko Nomi in the 1970s. In Korea, it became mainstream pop culture through dramas, variety shows, and webtoons from the 2000s onward. It remains especially popular in East Asian cultures including Korea, Japan, and Taiwan.
Generally, Type O and Type A are known as the best combination (85 points). Type O's embrace and leadership complement Type A's meticulousness perfectly. Type AB with AB (82 points) and Type B with O (80 points) also score highly.
This blood type compatibility test is entertainment content based on blood type personality theories popular in Korea and Japan. Results are grounded in cultural tradition and common beliefs rather than scientific evidence. Please do not use these as criteria for actual relationship decisions. All relationships are ultimately determined by sincere communication and mutual effort, not blood types.
The origins of blood type personality theory trace back to Professor Takeji Furukawa's 1927 research paper "A Study of Temperament Through Blood Type" in Japan. While it initially attracted academic interest, it was criticized for lacking scientific evidence and was largely forgotten. In the 1970s, Japanese author Masahiko Nomi revived the theory through popular books about blood type personality types. In Korea, the theory gained explosive popularity from the 2000s onward through dramas, variety shows, and webtoons, becoming a staple topic in everyday conversation. This test is entertainment content for fun purposes and has no scientific basis.
Blood type personality theory is especially popular in East Asian cultures including Korea, Japan, and Taiwan. Just as horoscopes are part of Western pop culture, blood types serve as a cultural code for casually discussing personality and relationships in East Asia. On blind dates, asking "What's your blood type?" is frequently used as an icebreaker to gauge someone's personality. In workplaces, differences in work styles among team members are sometimes playfully attributed to blood types. However, stereotyping or discriminating against people based on blood type should be avoided — it should always be enjoyed as light-hearted cultural entertainment.
The ABO blood type system was discovered by Austrian physician Karl Landsteiner in 1901. Based on antigens present on the surface of red blood cells, blood is classified into four types: A, B, O, and AB. Type A carries only A antigens, Type B only B antigens, Type AB carries both A and B antigens, and Type O carries no antigens. Globally, Type O is most common (about 44%), followed by Type A (about 42%), Type B (about 10%), and Type AB (about 4%), though distribution varies by region and ethnicity. In Korea, Type A is most common (about 34%), followed by Type O (about 28%), Type B (about 27%), and Type AB (about 11%). While ABO blood types are crucial medical indicators for blood transfusions and organ transplants, there is no scientific correlation with personality or compatibility.