Zodiac Compatibility Calculator
Choose two star signs, or enter two birthdays, to see how compatible they are in love and friendship, and why.
Pick two signs, then press Check compatibility.
By Shah Rukh, software developer · Last updated:
How zodiac compatibility works
In astrology, how two signs get along depends largely on the angle between them on the zodiac wheel. Astrologers call these angles aspects. This calculator scores every pair of signs using the aspect they form:
| Signs apart | Aspect | Score | Example |
|---|---|---|---|
| 4 | Trine (same element) | 90% | Aries + Leo |
| 2 | Sextile (complementary elements) | 85% | Taurus + Cancer |
| 0 | Conjunction (same sign) | 80% | Gemini + Gemini |
| 6 | Opposition (opposite signs) | 75% | Aries + Libra |
| 1 | Semi-sextile (neighbours) | 60% | Virgo + Libra |
| 5 | Quincunx | 55% | Leo + Capricorn |
| 3 | Square | 50% | Aries + Cancer |
Compatibility by element
- Fire + Air: air feeds fire. Lively, social and adventurous pairings.
- Earth + Water: water nourishes earth. Stable, caring and loyal pairings.
- Same element: easy understanding and shared values.
- Fire + Water, Earth + Air: very different styles that need more patience.
Best matches for each sign
| Sign | Most harmonious (trines) | Friendly (sextiles) |
|---|---|---|
| Aries | Leo, Sagittarius | Gemini, Aquarius |
| Taurus | Virgo, Capricorn | Cancer, Pisces |
| Gemini | Libra, Aquarius | Aries, Leo |
| Cancer | Scorpio, Pisces | Taurus, Virgo |
| Leo | Aries, Sagittarius | Gemini, Libra |
| Virgo | Taurus, Capricorn | Cancer, Scorpio |
| Libra | Gemini, Aquarius | Leo, Sagittarius |
| Scorpio | Cancer, Pisces | Virgo, Capricorn |
| Sagittarius | Aries, Leo | Libra, Aquarius |
| Capricorn | Taurus, Virgo | Scorpio, Pisces |
| Aquarius | Gemini, Libra | Aries, Sagittarius |
| Pisces | Cancer, Scorpio | Taurus, Capricorn |
Don’t know a sign? Find it with the zodiac sign calculator.
This tool is for entertainment only. A relationship depends on the people in it, not on their sun signs.
Frequently asked questions
How is zodiac compatibility calculated here?
We look at the angle between the two signs on the zodiac wheel, the same idea astrologers call aspects. Signs of the same element (trines) score highest, complementary elements (sextiles) next, and squares lowest. It is a fixed, explainable method, not a random number.
Which zodiac signs are most compatible?
Traditionally, signs of the same element (for example Aries, Leo and Sagittarius) and signs in complementary elements (Fire with Air, Earth with Water) are considered the most compatible.
Which signs are least compatible?
Squares, signs three places apart such as Aries and Cancer or Taurus and Leo, are seen as the most challenging, because they clash in element while sharing the same modality.
Are opposite signs compatible?
Opposite signs (such as Aries and Libra) often feel a strong attraction because each has qualities the other lacks. They score in the middle-high range here.
Can two incompatible signs have a good relationship?
Absolutely. Sun signs are only a tiny part of astrology, and real compatibility comes from values, communication and respect. Treat this tool as fun, not as advice.