Frequently asked question

What Is a Sun Sign?

Updated August 4, 2026By Zodiac Calendar EditorialReviewed for clarity and sourcing
Quick answer: A sun sign is the zodiac sign occupied by the Sun in an astrological chart. It is the sign people usually mean when they ask, “What is your sign?”
Key takeaways
  • It is calculated from the Sun’s zodiac longitude.
  • It is only one part of a full birth chart.
  • Transition-day births may require an exact calculation.

Sun sign versus zodiac sign

In casual language the terms are often used interchangeably. More precisely, a zodiac sign is one of twelve sections; a sun sign is the section containing the Sun.

What it can and cannot tell you

Astrologers associate the Sun with identity, vitality and conscious purpose. It does not determine the Moon sign, rising sign, houses or complete personality.

How it is calculated

A chart calculation identifies the Sun’s longitude for a date, time and location, then assigns it to the relevant zodiac sign.

Browse all zodiac questions or continue with the related guides below.

Best next reference

12 zodiac signs · Sun in astrology

Editorial note: Astrological meanings on this page describe traditional interpretations. They are not presented as scientifically proven personality facts.

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