Original Research
The Zodiac Compatibility Index
We scored all 144 zodiac sign pairings on a single 0–10 scale. Here is the complete ranking — the most compatible pairs, the most challenging, and how every sign stacks up.
Key Findings
- • The most compatible pairing is Aries & Sagittarius at 8.2/10.
- • The most challenging pairing is Gemini & Pisces at 5.3/10.
- • Capricorn is the most compatible sign overall (avg 6.9/10); Sagittarius the most challenging (avg 6.3/10).
- • Earth + Water is the strongest element combination (avg 8/10).
- • The average compatibility score across all 144 pairings is 6.5/10.
The 10 Most Compatible Zodiac Pairs
The 10 Most Challenging Zodiac Pairs
Every Sign Ranked by Average Compatibility
Element Combinations, Ranked
Methodology
Each of the 144 sign pairings is scored on a 0–10 scale derived from classical astrological principles: the relationship between the two signs' elements (Fire, Earth, Air, Water) and their modalities (cardinal, fixed, mutable). Complementary elements — Fire with Air, Earth with Water — score highest; same-element pairs share an intuitive understanding; opposing temperaments score lowest. These figures describe Sun-sign tendencies. A personalised reading that includes both people's Moon and Rising signs produces a more precise result, which you can generate free below.
Get your exact compatibility score
These rankings are based on Sun signs. Enter two birth dates for a reading built on both full charts.
Check your compatibility →Common Questions
What are the most compatible zodiac signs?
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Across all 144 zodiac pairings, the most compatible pair is Aries and Sagittarius, scoring 8.2/10. The top matches are dominated by Earth–Water and Fire–Air combinations, which share complementary elemental energy. Capricorn ranks as the single most compatible sign overall, averaging 6.9/10 across all twelve partners.
What are the least compatible zodiac signs?
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The most challenging pairing is Gemini and Pisces at 5.3/10. The hardest matches cluster around Fire–Water and Earth–Air combinations, which must bridge fundamentally different communication and emotional styles. Sagittarius averages the lowest compatibility overall at 6.3/10, though any pairing can work with awareness.
Which element combination is most compatible?
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Earth + Water is the most compatible element combination, averaging 8/10. In general, Fire pairs best with Air (Air feeds Fire) and Earth pairs best with Water (Water nourishes Earth). Same-element pairings share an easy, intuitive understanding.
How is the compatibility score calculated?
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Each of the 144 pairings is scored on a 0–10 scale derived from the two signs' elemental relationship and modality (cardinal, fixed, mutable). The average score across all pairings is 6.5/10. A personalised reading using both people's full birth charts — Sun, Moon, and Rising signs — produces a more precise result than Sun sign alone.