What is a zodiac sign?
Your zodiac sign — also called your sun sign or star sign — is the constellation the sun was passing through at the moment you were born. It's the foundation of your astrological profile and the sign people mean when they ask "what's your sign?". Each of the twelve signs has its own element, energy and personality.
The 12 zodiac signs & their dates
Sun sign vs the rest of your chart
Your sun sign is just the beginning. A full birth chart also has a moon sign (your emotions) and a rising sign (the face you show the world), plus every planet in a sign. For the bigger cosmic picture, explore your star chart; for the numbers side of you, your life path number.
What can your sign tell you?
Your sun sign describes your core identity, your natural strengths and the way you shine. It's a mirror for self-understanding — and a fun lens on relationships, since some signs naturally harmonise. Curious how yours matches with someone else's? Try the zodiac compatibility calculator.
Your questions, answered
What if I'm born on a cusp?
If your birthday is on the boundary between two signs, you're "on the cusp". The exact dates shift slightly each year, so a precise birth chart confirms your sun sign — but you may relate to both.
Is sun sign the same as star sign?
Yes — "sun sign" and "star sign" mean the same thing: the zodiac sign the sun was in at your birth.
Is the zodiac sign calculator free?
Yes — find your sign and read your traits for free, no account needed. A personalised daily horoscope is part of premium.
Does my sign affect compatibility?
Many people find their sun signs hint at chemistry — especially by element. See how two signs match with the zodiac compatibility calculator.