How the Birth Chart Calculator Works
The birth chart (or natal chart) is the complete map of the sky at the exact moment of your birth. This calculator determines the position of all major celestial bodies -- Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto -- plus the Ascendant and Midheaven.
What You Need
To calculate an accurate birth chart, you need three pieces of information: your date of birth, exact time of birth (for the Ascendant and house cusps), and place of birth (for geographic coordinates).
Understanding Your Chart
- Sun Sign: your core identity and conscious self
- Moon Sign: your emotional world and instinctive reactions
- Ascendant: how you present yourself to the world
- Mercury: how you think and communicate
- Venus: how you love and what you value
- Mars: how you act and express energy
- Jupiter: where you find growth and opportunity
- Saturn: your challenges and areas of discipline
The Calculation
This calculator uses astronomical ephemeris and the Placidus house system, the most widely used in Western astrology. The results include the zodiac sign for each planet, providing a complete overview of your astrological profile.