Free Compatibility Test & Calculator
Enter two birth dates — or pick your zodiac signs — and get instant match scores.
100% free
No sign-up and no limits — check as many pairings as you like.
Private by design
The tools run in your browser. Nothing you enter is stored or sent anywhere.
Transparent scoring
Every score comes from a deterministic model, so the same pairing always gets the same result.
214 pairing guides
All 78 zodiac pairings and all 136 MBTI pairings, each with a full written guide.
Enter birth dates or signs
Don’t know a sign? Enter the birthday and we work it out — or browse the MBTI matrix.
Get instant scores
See an overall match plus six relationship-dimension breakdowns.
Read the pairing guide
Each combination has strengths, friction points, and practical advice.
Zodiac compatibility by sign
Each sign hub shows its best and most challenging matches, with links to every pairing.
March 21 – April 19
April 20 – May 20
May 21 – June 20
June 21 – July 22
July 23 – August 22
August 23 – September 22
September 23 – October 22
October 23 – November 21
November 22 – December 21
December 22 – January 19
January 20 – February 18
February 19 – March 20
What is a compatibility test?
A compatibility test compares two people through a structured lens — zodiac signs, personality types, birth dates, or full birth charts — and describes how naturally they align in communication, emotional rhythm, values, and daily life. Instead of a vague “good match / bad match” label, a useful compatibility calculator shows where a relationship flows easily and where it takes more deliberate effort.
Every score on this site is computed with a transparent, deterministic model, so results stay consistent and explainable. Whether you are dating, committed, or simply curious, treat these pages as conversation starters. The goal is clarity and practical insight, not hype.
Zodiac compatibility: elements and modalities
Zodiac compatibility starts with the four elements. Fire signs (Aries, Leo, Sagittarius) and air signs (Gemini, Libra, Aquarius) share an outward, expressive energy, while earth signs (Taurus, Virgo, Capricorn) and water signs (Cancer, Scorpio, Pisces) pair well through stability and emotional depth. On top of that, each sign has a modality — cardinal, fixed, or mutable — that shapes how two people initiate, commit, and adapt together.
Our zodiac compatibility chart covers all 78 sun sign combinations. Start from the full zodiac compatibility matrix or jump straight to a sign hub above to see its best matches.
MBTI compatibility: how personality types match
Personality type compatibility looks at how two of the 16 MBTI types communicate, make decisions, and handle conflict. Some pairings share so many preferences that understanding comes easily; others — like the famous ENFP and INTJ pairing — thrive on complementary differences.
Explore the MBTI compatibility chart to compare all 16 personality types, with scores for communication style, emotional connection, conflict resolution, and long-term growth in each of the 136 pairings.
Birthday and birth chart compatibility
Sun signs are only the first layer. Numerology-based birthday compatibility compares life path numbers from two birth dates, and birth chart synastry maps how two complete charts — Moon, Venus, Mars, and beyond — interact. Both tools are in development and will join the zodiac and MBTI calculators here.
How we score compatibility
A clear, repeatable method — with the reasoning shown on every pairing page.
Deterministic model
Scores are computed, not made up — the same two signs always produce the same numbers.
Astrological structure
Zodiac scores weigh element, modality, and polarity interactions between the two signs.
Six dimensions
Every pairing is scored across six dimensions, then combined into one overall result.
Honest limits
Compatibility scores describe typical patterns. They are guidance for reflection, not destiny.
Frequently Asked Questions
A compatibility test compares two people across a structured framework — such as zodiac signs or MBTI personality types — and estimates how naturally they align in areas like communication, emotional connection, and values. It is a starting point for understanding a relationship, not a verdict on it.
Zodiac scores come from a deterministic model that weighs the element, modality, and polarity relationship between two signs. MBTI scores use a letter-axis heuristic across the four preference axes; they do not model cognitive functions. The same canonical pairing always produces the same score, and the model is explained in our methodology.
Signs that share an element often score highest: fire with fire (like Aries and Leo), water with water (like Cancer and Scorpio), and so on. Complementary element pairs such as fire with air or earth with water also tend to do well. Check any pairing page for the full breakdown.
You don’t need to. Switch the calculator to “By birth date” and enter each person’s birthday — the tool converts dates to sun signs automatically (for example, July 23 to August 22 is Leo) and shows the match instantly. The conversion happens in your browser, so nothing you enter is stored or sent anywhere.
Sun sign compatibility describes broad temperament patterns, so treat it as a lens rather than a prediction. Real relationships depend on maturity, communication, and circumstances.
MBTI is not a scientific predictor of relationship success, but it is a useful vocabulary for how two people communicate, recharge, make decisions, and handle conflict. Our MBTI pairing guides focus on those practical dynamics rather than promising outcomes.
Yes. Every tool and every pairing guide on MyCompatibility is free to use, with no account, no email, and no usage limits.
Absolutely. A lower score points to areas where two temperaments typically need more deliberate effort — it never means a relationship is doomed. Many strong couples are built on exactly the differences these tools highlight.