Sun Sign
Your core style and what helps you feel like yourself.
Personal astrology for everyday choices
What is a birth chart?
A birth chart is a map of where the planets were when you were born. It helps you explore your patterns, strengths, and timing themes.
Last updated: 2026-08-21
See My Birth Chart
Your birth chart is a snapshot of the sky at the moment you were born — the positions of the Sun, Moon, and every planet across the twelve houses and zodiac signs. Read together, it is the most detailed map astrology offers of your personality, timing, and potential.
Cosmic Copilot uses deterministic VSOP87 calculations and IANA timezone data. Supported planetary outputs are compared with astro.com reference values in automated tests using a 0.5° tolerance; this is a test threshold, not a universal accuracy guarantee. 10 house systems supported: Placidus, Whole Sign, Equal, Koch, Campanus, Regiomontanus, Morinus, Porphyry, Alcabitius, and Topocentric.
Moon Sign
Your feelings, needs, and emotional rhythm.
Rising Sign
How you come across first and how you start things.
What's Included in Your Birth Chart
1
Share Your Birth Details
Add your birth date, time, and place.
2
See Your Personal Chart
Your placements and current patterns are brought together in one view.
3
Return for Practical Guidance
Come back for calm, personalized context when you are weighing a next step.
Trusted Accuracy
VSOP87
Verified astronomy model for planet positions
0.5°
Checked against trusted chart references
10
House system choices for different astrology styles
Chart math first. Interpretation second.
VSOP87 Ephemeris
Trusted astronomy model for stable planet positions
10 House Systems
Choose the house system that fits your practice
See Your Chart
See the transits and chart context behind the guidance
Plainly worded
Designed for specific, non-fear-based daily guidance
Frequently Asked Questions
What is a birth chart?
A birth chart is a map of where the planets were when you were born. It helps you explore your patterns, strengths, and timing themes.
What do I need to calculate my birth chart?
You need birth date, birth time, and birth place. If birth time is missing, you can still start, then refine later.
Why is birth time important?
Birth time helps calculate your Rising sign and houses. A small time change can shift those parts of the chart.
How accurate is this birth chart calculator?
We use verified chart calculations and compare outputs with trusted references for consistency.
What house system should I use?
Placidus is common and used by default. Whole Sign is also popular and simple to read. Try both and keep the one that reads best for you.
Related Guides
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It takes about 2 minutes. Start with Cosmic and read your chart in simple language.
See My Birth Chart