Zodiac Compatibility Calculator
How compatible are your zodiac signs? Enter two birth dates to get both signs, their elements and a compatibility score.
How the score is worked out
Astrology arranges the 12 signs in a circle and judges a pair by the angle between them, called the aspect:
- Trine (120°) – same element, e.g. Aries and Leo: 95%
- Same sign: 85%
- Sextile (60°) – compatible elements (fire with air, earth with water): 78%
- Opposition (180°) – opposites attract: 72%
- Semi-sextile (30°): 50% and quincunx (150°): 48%
- Square (90°) – the most challenging pair: 42%
Example
Born on 12 April 1995 (Aries, fire) and 3 August 1994 (Leo, fire): two fire signs four places apart form a trine – 95%, the classic best match.
Zodiac sign dates
Aries 21 March – 19 April, Taurus 20 April – 20 May, Gemini 21 May – 20 June, Cancer 21 June – 22 July, Leo 23 July – 22 August, Virgo 23 August – 22 September, Libra 23 September – 22 October, Scorpio 23 October – 21 November, Sagittarius 22 November – 21 December, Capricorn 22 December – 19 January, Aquarius 20 January – 18 February, Pisces 19 February – 20 March. The exact change-over can move by a day from year to year.
The four elements
Fire: Aries, Leo, Sagittarius. Earth: Taurus, Virgo, Capricorn. Air: Gemini, Libra, Aquarius. Water: Cancer, Scorpio, Pisces.
Astrology has no scientific support – read the result for entertainment.
Frequently asked questions
Which zodiac signs are most compatible?
In astrology, signs of the same element (trines) – for example Aries, Leo and Sagittarius – are seen as the most harmonious.
Which signs are least compatible?
Signs three places apart (squares), such as Aries and Cancer, are traditionally the most challenging.
What if I was born on the cusp?
The calculator uses the usual sign dates; if you were born on a change-over day, your sign can depend on the year and the time of birth.