Zodiac Sign Calculator
Western astrology divides the year into twelve zodiac signs, each associated with a range of calendar dates. The system originated in ancient Babylon and was later refined by Greek astronomers. By simply entering your birth date, this calculator identifies your sun sign — the zodiac constellation the Sun occupied on the day you were born — and reveals its classical element (Fire, Earth, Air, or Water) along with its traditional symbol.
Each zodiac sign carries a distinctive set of personality traits that astrologers have described for centuries. Aries brings boldness and energy; Pisces brings compassion and creativity. While astrology is not a science, exploring your sign can be a fun way to reflect on your personality and understand why certain traits are traditionally associated with particular times of year. All calculations are performed entirely offline, with no data leaving your device.
How it works
The algorithm maps (month, day) pairs to one of the twelve zodiac bands using fixed annual date ranges (e.g., Aries: March 21 – April 19). Capricorn is the only sign that wraps across the year boundary (December 22 – January 19) and is handled as a special case.
Use cases
- Quickly look up your own or a friend's Western zodiac sign
- Compare signs to explore astrological compatibility
- Learn which element (Fire, Earth, Air, Water) governs each sign
- Settle birthday-zodiac trivia questions instantly
- Introduce children to astrology and the constellations of the ecliptic
Frequently asked questions
How do I find out my zodiac sign?
Your Western zodiac sign is determined by the date the Sun occupied a given constellation on your birthday. Simply enter your birth date and the calculator matches it to one of the twelve signs. For example, a March 21 to April 19 birthday is Aries, while December 22 to January 19 is Capricorn.
What are the dates for each zodiac sign?
The twelve signs follow fixed date ranges: Aries March 21–April 19, Taurus April 20–May 20, Gemini May 21–June 20, Cancer June 21–July 22, Leo July 23–August 22, Virgo August 23–September 22, Libra September 23–October 22, Scorpio October 23–November 21, Sagittarius November 22–December 21, Capricorn December 22–January 19, Aquarius January 20–February 18, and Pisces February 19–March 20.
What are the four zodiac elements?
Each sign belongs to one of four classical elements. Fire covers Aries, Leo, and Sagittarius; Earth covers Taurus, Virgo, and Capricorn; Air covers Gemini, Libra, and Aquarius; and Water covers Cancer, Scorpio, and Pisces. Astrologers use these groupings to describe shared temperaments among signs.
What sign am I if I was born on the cusp?
Being born on a cusp means your birthday falls near the boundary between two signs, such as around April 19 to April 20 for Aries and Taurus. This calculator assigns you the sign whose fixed date range includes your day. Because the Sun's exact entry into a sign can shift by a day some years, borderline birthdays are the most likely to vary between sources.
Is astrology and the zodiac scientifically proven?
No, astrology is not a science and there is no scientific evidence that zodiac signs influence personality or events. It is a centuries-old tradition that many people enjoy for self-reflection and entertainment. This calculator is offered in that spirit, mapping birth dates to signs based on their traditional date ranges.