Zodiac Compatibility Calculator
This index uses only Sun signs, elements, modalities and whole-sign spacing. It is an interpretive scale, not a measured probability of attraction, marriage or relationship success.
Check your compatibility
This index uses only Sun signs, elements, modalities and whole-sign spacing. It is an interpretive scale, not a measured probability of attraction, marriage or relationship success.
Element compatibility guide
Zodiac compatibility begins with the four elements. Signs sharing the same element or complementary elements tend to have natural chemistry.
Fire + Air
Passionate and stimulating. Fire ignites ideas, Air fans the flames.
Aries, Leo, Sagittarius + Gemini, Libra, Aquarius
Earth + Water
Nurturing and stable. Earth provides structure, Water brings emotional depth.
Taurus, Virgo, Capricorn + Cancer, Scorpio, Pisces
Fire + Fire
Electric and adventurous. Intense passion, but watch for power struggles.
Aries, Leo, Sagittarius + Aries, Leo, Sagittarius
Earth + Earth
Grounded and reliable. Shared values and long-term vision.
Taurus, Virgo, Capricorn + Taurus, Virgo, Capricorn
Sun sign compatibility vs full synastry
Sun Sign Compatibility
- • Based on one planet (Sun) per person
- • Sun-sign index
- • This index uses only Sun signs, elements, modalities and whole-sign spacing. It is an interpretive scale, not a measured probability of attraction, marriage or relationship success.
- • Available without birth time
Full Synastry Analysis
- • The app offers a free compatibility preview. Full report depth requires Cosmic or an eligible one-time purchase.
- • Moon signs reveal emotional compatibility
- • Venus placements show love language match
- • Mars placements reveal passion dynamics
- • This index uses only Sun signs, elements, modalities and whole-sign spacing. It is an interpretive scale, not a measured probability of attraction, marriage or relationship success.
Browse all 144 compatibility pairings
78 unique pairs cover all 144 ordered sign selections. Reversing two signs opens the same guide.
Frequently Asked Questions
How does zodiac compatibility work?
This index uses only Sun signs, elements, modalities and whole-sign spacing. It is an interpretive scale, not a measured probability of attraction, marriage or relationship success.
Is Sun sign compatibility accurate?
This index uses only Sun signs, elements, modalities and whole-sign spacing. It is an interpretive scale, not a measured probability of attraction, marriage or relationship success.
What is synastry?
The app offers a free compatibility preview. Full report depth requires Cosmic or an eligible one-time purchase.
Which zodiac signs are most compatible?
Signs of the same element tend to be highly compatible: Fire signs (Aries, Leo, Sagittarius), Earth signs (Taurus, Virgo, Capricorn), Air signs (Gemini, Libra, Aquarius), and Water signs (Cancer, Scorpio, Pisces). Fire and Air signs also pair well, as do Earth and Water signs. However, any combination can work with awareness and effort.
Can incompatible zodiac signs have a good relationship?
No sign pair determines whether a marriage will work. Discuss commitment, money, household work and future plans together.
Go beyond Sun signs
The app offers a free compatibility preview. Full report depth requires Cosmic or an eligible one-time purchase.
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