Free Birth Chart Calculator
Discover Your Cosmic Blueprint
Create your complete natal chart with our free birth chart calculator. Get accurate planetary positions for your exact birth time and location.
About the Free Birth Chart Calculator
A birth chart (also called a natal chart or horoscope) is a map of where all the planets were at the exact moment you were born. It reveals your personality traits, strengths, challenges, and life purpose according to astrological tradition.
Our birth chart calculator uses precise astronomical data from the Swiss Ephemeris to calculate planetary positions accurate to within arc-seconds. Simply enter your birth date, time, and location to generate your complete astrological profile.
The chart shows the positions of the Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto in the zodiac signs and houses. It also calculates aspects—the angular relationships between planets that reveal how different parts of your personality interact.
Features
- Accurate planetary positions using Swiss Ephemeris
- All major celestial bodies plus Chiron and asteroids
- Multiple house systems: Placidus, Whole Sign, Equal, Koch, Campanus
- Tropical and Sidereal zodiac options
- Aspect patterns with customizable orbs
- Interactive 3D solar system visualization
- PDF export for your chart
- Detailed planet-in-sign interpretations
How to Use
- Enter your birth date (day, month, year)
- Enter your exact birth time (check your birth certificate)
- Enter your birth location (city and country)
- Click "Calculate" to generate your chart
- Explore the interactive 3D view of your chart
Frequently Asked Questions
What is a birth chart?
A birth chart is a snapshot of the sky at the exact moment and location of your birth. It shows the positions of the Sun, Moon, and planets in the zodiac signs and houses, providing a cosmic blueprint of your personality, potential, and life path.
Why do I need my exact birth time?
Your birth time determines your Rising sign (Ascendant) and the house positions of all planets. The Ascendant changes approximately every 2 hours, so even a 30-minute difference can significantly affect your chart. If you don't know your exact time, you can use noon, but the house positions and Rising sign won't be accurate.
What is the difference between Sun sign and Rising sign?
Your Sun sign represents your core identity and ego—it's determined by the date of your birth. Your Rising sign (Ascendant) represents your outward personality and first impressions—it's determined by the exact time and location of your birth. Both are important for a complete understanding of your chart.
What house system should I use?
Placidus is the most commonly used house system in Western astrology and is our default. Whole Sign houses are popular in Hellenistic and Vedic traditions. If you're unsure, start with Placidus, but you can experiment with different systems to see which resonates most.