Zodiac Sign Calculator | What Is My Zodiac Sign Free

Find Your Zodiac Sign by Birth Date

This tool compares your birth month and day against the twelve fixed date ranges of the tropical zodiac to show your sun sign, its ruling planet, its element, and a short list of personality traits associated with it. No birth year, time, or location is needed, because sun sign boundaries repeat identically every calendar year.

How the Calculation Works

Western astrology divides the calendar into twelve sun sign periods of roughly thirty days each, starting with Aries on March 21 and ending with Pisces on March 20 of the following year. The calculator checks which of these fixed ranges your birthday falls inside, then looks up that sign's element and ruling planet. The four elements, fire, earth, air, and water, repeat in that order every three signs, and each sign carries one of the ten planets that astrologers traditionally link to it, such as Venus with Taurus and Libra or Mars with Aries.

Worked Examples

A birthday on July 14 falls inside the Cancer range of June 21 to July 22, making Cancer the sign, a water sign ruled by the Moon with tenacious and imaginative traits. A birthday on November 30 falls inside the Sagittarius range of November 22 to December 21, a fire sign ruled by Jupiter, described as generous and idealistic with a strong sense of humor.

The Twelve Sun Signs