Zodiac Sign Calculator – Free Sun Sign Finder (Western & Chinese)
Find your zodiac sign in one click. Enter your birth date to reveal your Western sun sign — complete with element, ruling planet, lucky color and compatibility — or your birth year to discover your Chinese zodiac animal. 100% free, instant and fully private.
What Is a Zodiac Sign Calculator?
A Zodiac Sign Calculator is a free online tool that reveals your astrological identity from the moment you were born. Using your birth date, it instantly works out your Western sun sign — one of the 12 zodiac constellations the Sun occupied when you arrived in the world. Using your birth year, it also finds your Chinese zodiac animal from the traditional 12-year cycle.
Whether you are curious about your horoscope, checking compatibility with a friend, or exploring astrology for the first time, this calculator gives you a complete profile in a single click — free, private, and working entirely in your browser.
How to Use the Zodiac Sign Calculator
Finding your sign takes just three quick steps:
- Choose a mode. Tap “Western Zodiac” to find your sun sign or “Chinese Zodiac” to find your lunar animal.
- Enter your birthday. Pick your birth date, or type your birth year for the Chinese zodiac.
- Reveal your result. Click the button and instantly see your sign, element, ruling planet, lucky color, lucky numbers and best compatibility matches.
Tip: hit the “Today” chip to find the sign for today’s date in one tap — great for quickly checking a friend’s birthday or today’s zodiac date range.
The 12 Zodiac Signs & Their Dates
Each Western sign covers a fixed date range and belongs to one of four classical elements:
| Sign | Symbol | Date Range | Element | Ruling Planet |
|---|---|---|---|---|
| Aries | ♈ | Mar 21 – Apr 19 | Fire | Mars |
| Taurus | ♉ | Apr 20 – May 20 | Earth | Venus |
| Gemini | ♊ | May 21 – Jun 20 | Air | Mercury |
| Cancer | ♋ | Jun 21 – Jul 22 | Water | Moon |
| Leo | ♌ | Jul 23 – Aug 22 | Fire | Sun |
| Virgo | ♍ | Aug 23 – Sep 22 | Earth | Mercury |
| Libra | ♎ | Sep 23 – Oct 22 | Air | Venus |
| Scorpio | ♏ | Oct 23 – Nov 21 | Water | Mars & Pluto |
| Sagittarius | ♐ | Nov 22 – Dec 21 | Fire | Jupiter |
| Capricorn | ♑ | Dec 22 – Jan 19 | Earth | Saturn |
| Aquarius | ♒ | Jan 20 – Feb 18 | Air | Uranus & Saturn |
| Pisces | ♓ | Feb 19 – Mar 20 | Water | Neptune & Jupiter |
How the Zodiac Sign Calculator Works
Western sun sign
The tool reads the month and day of your birth and maps them against the 12 fixed date ranges used by modern Western astrology (the tropical zodiac). If your date falls on a boundary day — such as April 20, when Aries ends and Taurus begins — the calculator correctly assigns the sign whose range includes your exact date.
sign = range(month, day) // matched against the 12 sign boundaries
Chinese zodiac animal
The Chinese zodiac follows a repeating 12-year cycle. The calculator finds your animal from your birth year using the standard formula, where each year maps to an animal in order: Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, Pig.
animal = CHINESE[year mod 12] // e.g. 2024 → Dragon
The five traditional elements — Wood, Fire, Earth, Metal and Water — are derived from the last digit of your birth year, adding an extra layer of detail to your profile.
Key Features of Our Zodiac Sign Calculator
- Western sun signs — all 12 signs with accurate boundary handling.
- Chinese zodiac — all 12 lunar animals plus the five elements.
- Complete profile — element, modality, ruling planet, lucky color and lucky numbers.
- Compatibility — see your most and least compatible sign matches.
- Instant results — sign revealed the moment you click.
- 100% private — everything runs locally; nothing is uploaded or stored.
- Fully responsive — works on phones, tablets and desktops.
Why People Use a Zodiac Sign Calculator
Curiosity & Self-Discovery
Millions of people look up their sign to learn more about their personality, strengths and tendencies. A quick lookup is the perfect starting point.
Compatibility & Relationships
Wondering whether you and your partner, friend or colleague are astrologically in sync? Check both signs to see the classic compatibility between them.
Gift-Giving & Birthdays
Find a friend’s or family member’s sign from their birthday and pick a lucky-color gift that feels personal and thoughtful.
Festivals & Lunar New Year
Each Lunar New Year ushers in a new animal. Use the Chinese zodiac mode to see which animal rules the coming year — and which one you were born under.
Frequently Asked Questions
What is a Zodiac Sign Calculator?
A Zodiac Sign Calculator is a free online tool that instantly determines your Western astrological sun sign from your date of birth, and your Chinese zodiac animal from your birth year. You simply enter your birthday and the tool reveals your sign together with its element, ruling planet, lucky color and more.
How do I find out what my zodiac sign is?
Pick your birth date in the calculator above and click 'Reveal My Sign'. The tool instantly shows your Western sun sign (Aries, Taurus, Gemini, etc.), its date range, element, modality, ruling planet, lucky color and compatible signs.
What are the 12 zodiac signs and their dates?
The 12 Western zodiac signs are: Aries (Mar 21–Apr 19), Taurus (Apr 20–May 20), Gemini (May 21–Jun 20), Cancer (Jun 21–Jul 22), Leo (Jul 23–Aug 22), Virgo (Aug 23–Sep 22), Libra (Sep 23–Oct 22), Scorpio (Oct 23–Nov 21), Sagittarius (Nov 22–Dec 21), Capricorn (Dec 22–Jan 19), Aquarius (Jan 20–Feb 18) and Pisces (Feb 19–Mar 20).
How is my Chinese zodiac sign determined?
Your Chinese zodiac animal is determined by your birth year using a 12-year cycle: Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog and Pig. For example, 2024 is the Year of the Dragon and 2025 is the Year of the Snake. The calculator also shows your associated element based on the last digit of your birth year.
Is the Zodiac Sign Calculator accurate?
Yes. The calculator uses the internationally recognized Western astrology date ranges and the standard 12-year Chinese zodiac cycle. Sign assignments match the commonly used tropical zodiac boundaries used by professional astrologers.
Does this calculator store my birth date?
No. All calculations are performed locally in your browser. We do not upload, store or share any of the information you enter, so your birthday stays completely private.
Can I use this Zodiac Sign Calculator on my phone?
Absolutely. The tool is fully responsive and works smoothly on mobile, tablet and desktop devices, so you can check your sign anywhere, anytime.