Relationship Compatibility Test — Zodiac + MBTI + Blood Type
Check your compatibility across three systems at once — zodiac signs, MBTI personality types, and blood type — and get a combined score with a short breakdown of each.
Person 1
Person 2
How this compatibility test works
This tool runs three separate comparisons — one based on zodiac sign, one on MBTI personality type, and one on blood type — then averages them into a single overall score. Each factor also shows its own individual score, so you can see which system is driving the result rather than just the combined number.
None of the three systems are scientifically validated ways to predict relationship success. Zodiac compatibility comes from astrological tradition, MBTI compatibility is based on how different personality-type pairings tend to communicate, and blood-type personality theory is a cultural belief most prominent in Japan and South Korea rather than an established psychological framework. This is built as a fun, structured way to compare notes across three popular systems at once — not a scientific assessment of your relationship.
How to use it
1. Enter both names
Adding names personalizes the written report at the end, though it isn't required for the score itself.
2. Select zodiac signs
Choose each person's sign based on birth date. If you're not sure of a sign, a quick search for "zodiac sign by birthday" will confirm it.
3. Choose MBTI types
If you don't already know your type, a free MBTI-style test online will give you a reasonable estimate — or leave the default selected and treat that portion of the score as less meaningful.
4. Select blood types
If you don't know your blood type, "O" is a reasonable default, though the blood-type portion of the score matters least of the three given how little evidence supports it.
5. Calculate
The button generates all three scores plus a combined overall result and a short written summary.
Frequently asked questions
What is a relationship compatibility test?
It's a tool that combines multiple compatibility factors — zodiac signs, MBTI personality types, and blood types — to give you a comprehensive compatibility score for your relationship.
How accurate is zodiac compatibility?
Zodiac compatibility is based on astrological traditions and personality traits associated with each sign. While not scientific, many people find it helpful for understanding relationship dynamics.
What is MBTI compatibility?
MBTI (Myers-Briggs Type Indicator) compatibility looks at personality types — like INTJ, ENFP, ISTJ, etc. — and how well different types communicate and relate to each other.
Does blood type affect relationship compatibility?
In some cultures (especially in Japan), blood type is believed to influence personality and relationship dynamics. We include it as one of the three compatibility factors for a comprehensive analysis.
Is this compatibility test free?
Yes, completely free. No signup required. All calculations run in your browser for privacy.
Can I use this compatibility test for any couple?
Absolutely. Our relationship compatibility test works for any couple — whether you're dating, engaged, married, or just curious about your compatibility.
How does the compatibility score work?
The compatibility score is calculated by averaging your zodiac compatibility, MBTI compatibility, and blood type compatibility scores. Each factor contributes equally to your overall score.
What are the most compatible zodiac signs?
Fire signs (Aries, Leo, Sagittarius) are generally compatible with air signs (Gemini, Libra, Aquarius). Earth signs (Taurus, Virgo, Capricorn) are compatible with water signs (Cancer, Scorpio, Pisces).
Do I need to know my MBTI type to use this tool?
Yes. If you don't know your MBTI type, you can take a free MBTI test online or select 'I don't know' in the dropdown, and the tool will use a default score.
If you want to go deeper on any one factor
This tool is built to be broad rather than deep — three systems compared at once, each covered briefly. If one factor is more interesting to you than the other two, our Zodiac & Numerology Calculator goes further into astrology specifically, combining it with life-path numerology rather than MBTI or blood type. And for a compatibility angle based on real day-to-day behavior instead of a birth date or personality label, our Habit Compatibility Quiz and Relationship Green Flag Score both work from actual patterns in the relationship rather than external systems.