Sun Sign Calculator

The Sun Sign Calculator determines your Western zodiac sign based on your birth date, identifying which of the twelve constellations the Sun appeared to occupy at the moment you were born. Your Sun sign is the most commonly referenced placement in astrology, the one people mean when they ask what sign you are, and it is said to represent your core identity, ego, and the central themes of your personality. Just enter your birth date and the tool maps it to the correct sign.

The calculation works by comparing your birth date against the standard date ranges for each sign, which trace the Sun's apparent annual path along the ecliptic through Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, and Pisces. Because the exact moment the Sun crosses from one sign into the next shifts slightly year to year, people born on the boundary between two signs are said to be born on the cusp, and a precise birth time can matter for them. The tool uses conventional tropical zodiac date ranges that most Western horoscopes follow.

Knowing your Sun sign is the entry point to reading horoscopes, understanding compatibility, and exploring a full birth chart. It pairs naturally with the Moon Sign Calculator, which reveals your emotional inner world, and planetary tools like the Venus Sign Calculator and Mars Sign Calculator for love and drive. Together these placements build a richer portrait than the Sun sign alone, which is why astrologers describe the Sun as just one piece of a larger chart.

A practical tip: if your birthday falls on or very near a cusp date, your birth time and year can tip you into the neighboring sign, so it is worth confirming with a full chart rather than relying on date alone. The tropical zodiac used here is tied to the seasons rather than the current physical position of the constellations, which is why it differs from sidereal or astronomical sign systems. Treat the result as the starting point for self-reflection and entertainment rather than a deterministic prediction.