Zodiac Sign Calculator

It maps your birth month and day to one of the twelve Western (tropical) sun signs using the standard fixed calendar date ranges. For example, March 21 to April 19 is Aries and April 20 to May 20 is Taurus. Only the month and day matter, so the year of birth never changes your sun sign.

Your sun sign reflects which 30-degree slice of the zodiac the Sun was passing through on your birthday, and that pattern repeats every year on roughly the same calendar dates. Because the date ranges are fixed, two people born on the same month and day share a sun sign regardless of which year they were born.

Aries (Mar 21 to Apr 19), Taurus (Apr 20 to May 20), Gemini (May 21 to Jun 20), Cancer (Jun 21 to Jul 22), Leo (Jul 23 to Aug 22), Virgo (Aug 23 to Sep 22), Libra (Sep 23 to Oct 22), Scorpio (Oct 23 to Nov 21), Sagittarius (Nov 22 to Dec 21), Capricorn (Dec 22 to Jan 19), Aquarius (Jan 20 to Feb 18), and Pisces (Feb 19 to Mar 20).

This calculator uses the standard published boundaries, where the listed start day belongs to the new sign. So January 20 is Aquarius, not Capricorn. Keep in mind that true astronomical cusp days can drift by about a day from year to year because the equinoxes do not fall on identical calendar dates every year.

Each sign carries a classical element (Fire, Earth, Air, or Water) and a modality (Cardinal, Fixed, or Mutable). The four signs that share your element form a triplicity, for example Aries, Leo, and Sagittarius are the Fire signs. These groupings are part of traditional astrology and are shown here as reference.

It accurately returns the conventional Western sun sign for any birth date using the widely published date ranges. Astrology itself is not a science, so treat the result as cultural reference and entertainment, not as a prediction or a basis for real decisions.