Sun sign
The Sun’s place in the tropical zodiac. This is the sign calculated on this page.
Available hereA little cosmic curiosity
Zodiac Sign Calculator
Your birthday. Your place in the zodiac.
Find your Western sun sign by date of birth. Add your birth time for a more specific result, or let us check whether your sign changes during the day.
Free to useNo sign-upBirth-time optional
01 / Your birth details
Let’s find your sun sign
Use the date and local time on your birth record.
02 / Your zodiac profile
A sign of who you’re curious about.
Your sun sign, its element and your place on the zodiac wheel will appear here.
Sun signCusp checkZodiac wheel
Western tropical zodiac · Sun sign only
02 / Your zodiac profile
Your sun sign
One birthday, two possible signs
Start of dayEnd of day
Traditional themes
View calculation details
Exports include your entered birth details. Review before sharing.
Astronomical calculationUses the Sun’s position for your birth year
Honest about cusp daysShows both possibilities when time matters
Built around your time zoneRegional zones include daylight-saving rules
A quick guide
How to find your zodiac sign
Your Western zodiac sign, often called your sun sign or star sign, is the zodiac sector occupied by the Sun at birth. A full birth date is a better starting point than a month alone.
- Enter your birth date.Choose day and month, then enter the year. Leap days are checked automatically.
- Add time if you know it.Use local birth time and the zone at your birthplace. Leave time unknown instead of guessing.
- Read your profile and cusp check.See one sign, or two possibilities with an estimated transition time when the Sun changes signs that day.
The twelve signs
Zodiac sign dates and elements
This zodiac dates chart is a quick reference. The dates are conventional ranges, not exact boundaries for every year. Use the calculator above for your birth date and time zone.
| Zodiac sign | Usual date range | Element | Modality | Ruler* |
|---|---|---|---|---|
| Aries | March 21 – April 19 | Fire | Cardinal | Mars |
| Taurus | April 20 – May 20 | Earth | Fixed | Venus |
| Gemini | May 21 – June 20 | Air | Mutable | Mercury |
| Cancer | June 21 – July 22 | Water | Cardinal | Moon |
| Leo | July 23 – August 22 | Fire | Fixed | Sun |
| Virgo | August 23 – September 22 | Earth | Mutable | Mercury |
| Libra | September 23 – October 22 | Air | Cardinal | Venus |
| Scorpio | October 23 – November 21 | Water | Fixed | Mars / Pluto |
| Sagittarius | November 22 – December 21 | Fire | Mutable | Jupiter |
| Capricorn | December 22 – January 19 | Earth | Cardinal | Saturn |
| Aquarius | January 20 – February 18 | Air | Fixed | Saturn / Uranus |
| Pisces | February 19 – March 20 | Water | Mutable | Jupiter / Neptune |
*For Scorpio, Aquarius and Pisces, the traditional ruler is listed first and the modern ruler second. These are astrological associations, not scientific personality measurements.
Get to know the zodiac
Explore your sign
Select any sign to explore its traditional symbolism. These descriptions are for reflection and cultural interest, not a personal assessment.
When dates are not enough
Born on a zodiac cusp?
A cusp is the boundary between two signs. The Sun crosses it at a particular instant, not automatically at midnight. For example, a March 20 birthday may fall in Pisces or Aries depending on the year, local time and time zone.
This calculator checks the beginning and end of your local birth date. When a sign change occurs, the timeline shows the sign before and after the transition. If you know your time, the tool uses that moment. If you do not, it preserves both possibilities.
Near a computed transition, small errors in the recorded birth time or astronomical model can affect the answer. Treat the displayed changeover minute as an estimate.
Different questions, different calculations
Sun sign vs. Moon sign, Rashi and rising sign
Searching for “zodiac sign by date of birth” can mean different things. This page answers the Western tropical Sun-sign question. A different result from an Indian horoscope is not automatically a mistake.
Moon sign / Janma Rashi
Janma Rashi refers to the Moon’s sidereal sign in common Vedic usage. It uses another body and reference system.
A separate calculationRising sign / Lagna
The zodiac degree rising on the eastern horizon. Birth time and geographic coordinates are essential.
A separate calculationChinese zodiac animals are another system, usually associated with the lunar-calendar birth year. This Western zodiac calculator does not calculate Chinese zodiac signs or a complete birth chart.
Behind the result
How this sun sign calculator works
We convert your entered local date and time to UTC, calculate the Sun’s apparent geocentric ecliptic longitude with Astronomy Engine, and divide the 360° tropical zodiac into twelve 30° sectors. Aries begins at 0°, Taurus at 30° and so on. The calculation uses the Sun’s centre and the equinox of date.
Sun-sign index = floor(Sun’s tropical longitude ÷ 30°)
For an unknown time, the calculator checks the whole local calendar day. A displayed degree is only provided when a birth time is supplied; we do not present a guessed noon position as your birth position. Regional time zones use your browser’s historical time-zone data. The manual UTC option uses the offset you select, including any daylight-saving adjustment.
Accuracy and limitations
Astronomy Engine documents a target accuracy of roughly one arcminute. That supports a useful Sun-sign calculation, but it is not a guarantee at the exact boundary. We flag timed results within 0.02° of a sign boundary. The tool supports birth dates from 1900 to today; very old local time records and unusual clock changes may require a manually verified offset.
Astrology’s personality interpretations and predictions are not scientifically established. The astronomical position and the cultural interpretation are different parts of this experience.
References & editorial notes
- Astronomy Engine: Sun-position method and UTC inputs
- Cafe Astrology: birth-time uncertainty on sign-change days
Maintained by CalcuPortal · Updated 20 October 2026 · Report a calculation or content issue
Your questions, answered
Zodiac sign calculator FAQs
How do I find my zodiac sign by date of birth?
Enter your full birth date and select the time zone where you were born. Add your birth time if you know it, then select Find my zodiac sign. The tool calculates the Sun’s tropical longitude instead of matching your birthday to a fixed date range.
Can I calculate my zodiac sign without my birth time?
Yes. Leave “I know my birth time” unchecked. The calculator checks the Sun’s sign across your local birth date. If it stays in one sign, you get that sign. If it changes, you get both possibilities and the estimated changeover time.
Is zodiac sign the same as sun sign or star sign?
In everyday Western horoscope usage, zodiac sign and star sign usually mean the Sun sign. A full birth chart also has a Moon sign, rising sign and other placements; they are not calculated here.
Why is my result different from a zodiac dates chart?
A printed chart uses approximate calendar ranges. The Sun crosses each sign boundary at a particular time, and that moment varies between years. Your birth time and time zone can therefore change the result near a boundary.
Can I be two zodiac signs if I was born on a cusp?
At a particular instant, the centre of the Sun has one tropical sign. If your birth time is unknown on a transition day, two signs may be possible. That is uncertainty about the time, not a thirteenth or combined zodiac sign.
Is this a Rashi calculator by date of birth?
No. This is a Western tropical Sun-sign calculator. In common Indian birth-chart usage, Janma Rashi is the Moon’s sidereal sign. A Rashi calculator uses a different celestial body and zodiac reference, so a different result is expected.
Do I need to enter my birthplace?
This geocentric Sun-sign calculation needs the correct time zone or recorded UTC offset, not latitude and longitude. Choose the zone in effect at your birthplace. Coordinates are needed for other calculations such as the rising sign.
How accurate is this zodiac sign calculator?
The tool uses Astronomy Engine to calculate the Sun’s apparent geocentric ecliptic longitude. Its documented accuracy target is about one arcminute, not perfect precision. Results very close to a boundary and birth times that are uncertain should be checked with a detailed ephemeris. Sign-change times are approximate.
Which zodiac sign is February 29?
February 29 is normally Pisces in the tropical zodiac. Enter your actual leap-year birth date for a calculated result. The form rejects February 29 in non-leap years.
Does the calculator save my birth details?
The calculator processes the inputs in your browser and does not send them to a calculation server or put them in a share URL. Copy and download actions include the result and the date/time settings you entered, so review them before sharing. The site’s general privacy policy still applies.