Zodiac Sign Calculator
Find the Western zodiac (star) sign that corresponds to any date of birth, based on the traditional calendar date ranges.
A reference lookup based on the traditional Western zodiac calendar — not an astronomical, psychological, or personality claim of any kind.
How this is determined
The 12 Western zodiac signs each correspond to a fixed range of calendar dates, based on the sun's position relative to the twelve constellations of the zodiac at the time this system was standardized. Your date of birth is simply matched against these traditional ranges.
All 12 signs and their 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
- Pisces: February 19 – March 20
Frequently asked questions
Why do some sources give slightly different date ranges?
The exact boundary dates vary a little between sources and calendar systems, and can shift by a day depending on the year due to how the calendar aligns with the solar year. This tool uses the most commonly published date ranges.
Is this based on real astronomy?
It's based on the traditional (tropical) zodiac calendar used in Western astrology, not on the current, precise astronomical positions of constellations, which have shifted over the centuries. This tool is for entertainment and traditional reference only.