Zodiac Compatibility

Pick two zodiac signs or birthdays and see the aspect between them, their elements and modalities, and what astrological tradition says.

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First sign

or pick a birthday

Second sign

or pick a birthday

Sign dates are approximate: the sun enters each sign on a slightly different day each year, so birthdays on the first or last day of a sign can fall either side.

Aries and Leo

Trine — 4 signs apart (120°)

Signs of the same element: traditionally the most beneficial aspect - harmony, ease and what comes naturally.

Aries	Fire · Cardinal
Leo	Fire · Fixed
Same element	Yes — both Fire
Same modality	No

Aries with every sign

Sign	Aspect	Element
Aries	Conjunction (same sign)	Fire
Taurus	Semisextile	Earth
Gemini	Sextile	Air
Cancer	Square	Water
Leo	Trine	Fire
Virgo	Quincunx (inconjunct)	Earth
Libra	Opposition	Air
Scorpio	Quincunx (inconjunct)	Water
Sagittarius	Trine	Fire
Capricorn	Square	Earth
Aquarius	Sextile	Air
Pisces	Semisextile	Water

What this page cannot tell you

This reports what astrological tradition says about the angle between two sun signs; it is not a prediction and astrology has no scientific support. Astrologers who compare full birth charts look at many more factors than sun signs, and they do not all agree on interpretations.

How to check zodiac compatibility

Pick the first sign. Or choose a birthday to find it.
Pick the second sign. The same way.
Read the aspect. How far apart the signs are and the traditional reading.
See every pairing. The first sign against all twelve.

10 reasons people compare zodiac signs

Curiosity about a partner

Someone checks their sign against a partner's.

Friend groups

Friends compare signs for fun.

Party icebreakers

A host uses signs as a conversation starter.

Learning astrology terms

A beginner learns what a trine or square is.

Writing characters

A novelist gives characters signs with tension.

Gifts

Someone picks a sign-themed gift.

Social media content

A creator makes a sign-pairing post.

Birthday cusps

Someone born on a cusp checks both signs.

Comparing elements

Someone sees which signs share their element.

Wedding favours

A couple prints their signs on favours.

What this page reports

Sign dates, elements (fire, earth, air, water) and modalities (cardinal, fixed, mutable) follow the Wikipedia article on astrological signs. The relationship between two signs is the astrological aspect their positions make on the 12-sign circle, 30° apart each: same sign (conjunction), 2 apart (sextile, 60°), 3 apart (square, 90°), 4 apart (trine, 120°), 6 apart (opposition, 180°), with the minor semisextile and quincunx between. The traditional reading of each aspect is summarised from Wikipedia's article on astrological aspects.

Limits: this reports astrological tradition, not a prediction. Astrology has no scientific support. The page compares sun signs only; astrologers who compare full birth charts use many more factors and do not all agree.

Sources

Frequently asked questions

Which signs are compatible in astrology?

Tradition reads signs of the same element (a trine) and complementary elements (a sextile) as the most harmonious.

What is a trine?

Two signs four apart, 120°, sharing an element.

What is a square in astrology?

Two signs three apart, 90°, sharing a modality; tradition reads it as tension.

What are the zodiac elements?

Fire: Aries, Leo, Sagittarius. Earth: Taurus, Virgo, Capricorn. Air: Gemini, Libra, Aquarius. Water: Cancer, Scorpio, Pisces.

Why do sign dates differ between websites?

The sun enters each sign on a slightly different day each year, so cusp dates move by a day.

Is zodiac compatibility scientific?

No. Astrology is not supported by scientific evidence; this page reports the tradition.