Zodiac Compatibility Checker for Any Two Signs

How the checker works

Choose any two signs. The order does not matter. You get two things:

• A short original write-up of the pairing, describing the strengths and friction points astrologers traditionally see when those two signs meet. There are 78 in all: 66 pairs of different signs and 12 same-sign matches.
• The structure behind it: whether the signs share an element or a modality, and the aspect between them, which is simply how many signs apart they sit on the zodiac wheel.

This is not a score. Percent ratings and heart counts make a sun-sign match look more precise than it is, so we left them out.

The geometry of a match

Astrology's traditional view of compatibility comes from the distance between signs, measured in steps of 30 degrees around the wheel.

Fire and air are called complementary because, in the old image, air feeds fire. Earth and water work the same way: water nourishes the soil and earth gives water a shape. You can read more in our guide to elements and modalities.

Beyond Sun signs

Your Sun sign is just one placement in your birth chart. When astrologers compare two people, a practice called synastry, they look at how each person's planets fall in relation to the other's. They pay special attention to:

• The Moon, for emotional needs and how each person wants to be cared for.
• Venus, for affection, taste and what feels romantic.
• Mars, for drive, desire and how each person handles conflict.
• The rising sign and the seventh house, traditionally the house of partnership.

Two people with "challenging" Sun signs might share a Moon sign, or have Venus and Mars in the same element. That is why astrologers treat a Sun-sign match as a first impression. To go further, calculate both charts with the birth chart calculator and compare the Moon, Venus and Mars signs using this checker.

A note on how to use this

Compatibility write-ups are entertainment. They can be a fun way to talk about how you and someone else differ, but they say nothing reliable about whether a relationship will work. Communication, respect and shared values matter more than any sign. If a relationship feels unsafe, please reach out to a trusted person or a local support service.

Common questions

Is there such a thing as an incompatible sign?

Not in any serious sense. Astrologers describe some pairings as easier and others as more challenging, but people of every combination build good relationships.

Should I use my Sun sign or my rising sign?

This checker uses Sun signs because most people know theirs. Many astrologers also compare Moon and Venus signs; you can find yours with the birth chart calculator.