Zodiac Compatibility Calculator
Check how two zodiac signs (or two birthdays) match by their classical aspect, elements and modalities, with strengths, challenges and a table of all 12 signs.
The score follows a fixed rule from the angle between the signs (trine 90, sextile 80, same sign 70, opposition 60, semi-sextile 50, square 40, quincunx 35). It is a traditional astrology heuristic for fun, not a measure of real compatibility.
| Pair | Aspect | Score |
|---|---|---|
| Aries + Aries | Same sign (conjunction) | 70% |
| Aries + Taurus | Neighbours (semi-sextile) | 50% |
| Aries + Gemini | Sextile | 80% |
| Aries + Cancer | Square | 40% |
| Aries + Leo | Trine | 90% |
| Aries + Virgo | Quincunx | 35% |
| Aries + Libra | Opposition | 60% |
| Aries + Scorpio | Quincunx | 35% |
| Aries + Sagittarius | Trine | 90% |
| Aries + Capricorn | Square | 40% |
| Aries + Aquarius | Sextile | 80% |
| Aries + Pisces | Neighbours (semi-sextile) | 50% |
Astrologers judge how two Sun signs get along mainly by the angle between them on the zodiac wheel — the same aspects used inside a birth chart — together with their elements (fire, earth, air, water) and modalities (cardinal, fixed, mutable). This calculator applies those classical rules to any two signs or two birthdays, explains what each combination is said to bring, and compares your sign with all twelve. It is a light-hearted tradition, not science.
How to use this tool
- Choose two signs, or switch to “Two birthdays” and enter both dates.
- Read the score, the aspect between the signs and what their elements and modalities suggest.
- Use the table to see how the first sign pairs with every other sign.
Formula
Distance d = min(|a − b|, 12 − |a − b|) signs → aspect = d × 30°
d = 0 same sign, 1 semi-sextile, 2 sextile, 3 square, 4 trine, 5 quincunx, 6 opposition. Trines join signs of the same element and sextiles join compatible elements (fire–air, earth–water), which is why they score highest; squares join signs of the same modality but clashing elements.
Example
Aries and Leo are four signs apart (120°), a trine between two fire signs: score 90%, with shared enthusiasm and courage. Aries and Cancer are three signs apart, a square between cardinal fire and cardinal water: score 40%, lively but prone to friction.
Frequently asked questions
Which signs are most compatible?
In this traditional scheme, signs of the same element (trines: Aries–Leo–Sagittarius, Taurus–Virgo–Capricorn, Gemini–Libra–Aquarius, Cancer–Scorpio–Pisces) score highest, followed by sextiles such as Aries–Gemini.
Do low scores mean a relationship will fail?
No. Sun-sign compatibility is a simple astrological rule of thumb with no scientific support. Plenty of happy couples have “square” signs; communication and shared values matter far more.
Why do birthdays near the end of a month warn about a cusp?
The Sun changes sign between the 19th and 23rd of each month at a different hour each year. If it changed on your birthday, your sign depends on the time of birth — check it with the zodiac sign calculator.
For entertainment only. Sun-sign compatibility is a traditional astrological rule of thumb with no scientific support; it is not relationship advice and says nothing about whether a real relationship will work. How we check our calculators · Full disclaimer
Last updated:
Page address with these inputs: https://kakao.mobile/tools/zodiac-compatibility-calculator/
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kakaoCalc. (2026, November 8). Zodiac Compatibility Calculator. https://kakao.mobile/tools/zodiac-compatibility-calculator/
“Zodiac Compatibility Calculator.” kakaoCalc, 8 Nov. 2026, kakao.mobile/tools/zodiac-compatibility-calculator/.
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