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Your birth chart (also known as a natal chart) is a snapshot of the sky at the moment you were born. It is used in astrology to describe personality, strengths and challenges.
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Astrology Calculator: Zodiac Signs, Birth Charts & Compatibility
This free Astrology Calculator helps you discover your zodiac sign, birth chart, moon sign, rising sign, and relationship compatibility. Enter your birth details to explore personality traits, planetary influences, and astrological insights instantly.
What Is Astrology?
Astrology is a system that studies how the positions of planets, stars, and celestial bodies may influence personality, emotions, relationships, and life paths. Astrology uses birth date, time, and location to generate zodiac signs and birth chart interpretations.
What Are Zodiac Signs?
Zodiac signs are 12 astrological signs based on your birth date. Each sign is connected to unique personality traits, elements, planets, and compatibility patterns.
The 12 zodiac signs are: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces.
| Element | Signs | Typical themes |
|---|---|---|
| Fire | Aries, Leo, Sagittarius | Energy, passion, confidence |
| Earth | Taurus, Virgo, Capricorn | Stability, practicality, patience |
| Air | Gemini, Libra, Aquarius | Ideas, communication, curiosity |
| Water | Cancer, Scorpio, Pisces | Emotion, intuition, empathy |
Sun Sign, Moon Sign and Rising Sign
Your sun sign is the zodiac sign most people mean when they ask for their sign, and it depends only on your birth date. Your moon sign reflects your emotional nature and changes about every two and a half days, so it needs your birth date and ideally your time. Your rising sign, or ascendant, changes roughly every two hours and needs your exact birth time and place. Together they make up the core of a birth chart.
Zodiac Signs Date Ranges
| Zodiac Sign | Date Range |
|---|---|
| Aries | March 21 – April 19 |
| Taurus | April 20 – May 20 |
| Gemini | May 21 – June 20 |
| Cancer | June 21 – July 22 |
| Leo | July 23 – August 22 |
| Virgo | August 23 – September 22 |
| Libra | September 23 – October 22 |
| Scorpio | October 23 – November 21 |
| Sagittarius | November 22 – December 21 |
| Capricorn | December 22 – January 19 |
| Aquarius | January 20 – February 18 |
| Pisces | February 19 – March 20 |
How This Astrology Calculator Works
The zodiac sign tab uses the standard date ranges above. The birth chart tab works out the positions of the Sun, Moon, Mercury, Venus, Mars and Jupiter from astronomical formulas for the tropical zodiac. The rising sign is calculated when you enter your birth time and a city from our list of major cities, which gives the coordinates and time zone for your birthplace. The compatibility tab scores two signs from traditional relationships between them, such as shared elements and the angle between the signs, and is meant to be read for fun. If you were born on the first or last day of a sign, check the cusp note, because the exact day the Sun changes sign varies slightly from year to year.
Astrology is a tradition for self-reflection and entertainment, not a science, and it cannot predict the future. For a closer look at your relationships, you can also try the love match calculator.
Astrology calculators are popular tools for discovering zodiac personalities, relationship compatibility, and natal chart meanings. Many people use astrology insights to better understand emotions, communication styles, strengths, and romantic compatibility. Whether you are exploring your sun sign, moon sign, or full birth chart, this astrology calculator provides quick and engaging horoscope-based insights for beginners and astrology enthusiasts alike.
How to Use This Astrology Calculator
Enter your birth date
Use the date picker, or type the date.
Add your birth city or location
This is shown with your result.
Click Calculate My Zodiac Sign
Instantly view your zodiac sign, element, ruling planet, and personality traits.
Enter your birth date and birth time
Use your local birth time for the best result.
Select your birth country and city
Pick a major city from the list for the rising sign.
Click Generate Birth Chart
View your Sun sign, Moon sign, Rising sign, dominant element, and planetary positions.
Enter your birth date and your partner's birth date
The zodiac signs are filled in for you.
Select both zodiac signs
Or choose any two signs to compare.
Click Check Compatibility
View your compatibility percentage, strengths, challenges, and relationship insights.