Zodiac Calculator
Determine your Western astrological zodiac sun sign from your calendar birth date. Uncover your sign’s ruling celestial body, elemental nature (Fire, Earth, Air, Water), and behavioral quality (Cardinal, Fixed, Mutable).
Calendar month of birth
Day of birth (1–31)
Primary Western astrological sun sign and constellation symbol
How to Use This Calculator
- Select your birth month from the dropdown menu.
- Enter the numerical day of your birth.
- View your zodiac sun sign, astrological symbol, and classical element.
- Review your sign’s ruling planet and annual calendar date range.
Formula & Calculation Methodology
The Western tropical zodiac divides the sun’s apparent 360-degree annual path along the celestial ecliptic into twelve equal 30-degree sectors, commencing at the vernal equinox (0° Aries).
Worked Example
Birthday: July 23 (First day of Leo)
Birthday: March 21 (Vernal Equinox, Aries)
Frequently Asked Questions
What is a cusp birthday?↓
A cusp occurs when someone is born on or near the transition boundary between two zodiac signs (typically within 1–2 days). The exact sun position depends on the precise birth hour, time zone, and orbital year.
What are the four classical zodiac elements?↓
The four elements are Fire (Aries, Leo, Sagittarius), Earth (Taurus, Virgo, Capricorn), Air (Gemini, Libra, Aquarius), and Water (Cancer, Scorpio, Pisces).
What is the difference between tropical and sidereal zodiacs?↓
Western astrology uses the tropical zodiac tied to Earth’s seasons (beginning at the spring equinox), whereas Vedic astrology uses the sidereal zodiac aligned with visible physical constellations that shift by ~1 degree every 72 years.
What is a limitation of knowing only your sun sign?↓
Your sun sign represents core identity, but a complete astrological natal birth chart also contains moon signs, rising (ascendant) signs, and planetary house positions based on exact birth time and geographic coordinates.