Free Birth Chart Calculator
Use this astrology chart calculator to generate your complete natal chart with Sun, Moon, Rising, and all planetary positions. Calculated with observatory-grade VSOP87 precision.
Free account. No credit card required. Instant results.
Quick preview: What's your Life Path number?
Enter your birth date for an instant numerology result. Your full birth chart calculator result (with time and location) gives you the complete picture.
What you need to calculate your birth chart
Birth Date
Your date of birth determines your Sun sign and planetary positions in the zodiac.
Birth Time
Your exact birth time determines your Rising sign and house placements. Check your birth certificate.
Birth Location
Your birthplace determines the local sidereal time and timezone, which affect house cusps.
What's in your birth chart
Your Big Three: Sun, Moon & Rising
Your Big Three are the foundation of your birth chart. Together they describe your core identity (Sun), emotional nature (Moon), and how others perceive you (Rising).
How accurate is this calculator?
VSOP87
Observatory-grade ephemeris
±0.001°
Planetary position accuracy
10
House systems supported
Verified against the Swiss Ephemeris (astro.com) and NASA/JPL Horizons. Historical timezone data from the IANA database ensures accuracy for all birth dates.
Frequently Asked Questions
Is this birth chart calculator really free?
Yes. This free birth chart calculator lets you see your Sun sign, Life Path number, and a preview of your Big Three for free. The full birth chart with all planetary positions, house placements, and aspects requires a free account (no credit card needed).
What do I need to calculate my birth chart?
Your birth date, birth time, and birth location. The birth time determines your Rising sign and house placements. Without it, you can still get your Sun sign and planetary positions, but the chart will be less precise.
How accurate is this calculator?
We use VSOP87 ephemeris — the same planetary theory used by observatories. Planetary positions are accurate to ±0.001° and verified against the Swiss Ephemeris (astro.com). Historical timezone data from the IANA database ensures accuracy for births before 2000.
What house systems do you support?
We support 10 house systems: Placidus, Whole Sign, Equal, Koch, Campanus, Regiomontanus, Morinus, Porphyry, Alcabitius, and Topocentric. You can switch between them after generating your chart.
What is included in the birth chart?
Your complete chart includes: Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto positions with exact degrees. Plus your Rising sign (Ascendant), Midheaven, all 12 house cusps, major aspects between planets, and essential dignities.
How is this different from Co-Star or other astrology apps?
Cosmic Copilot uses observatory-grade VSOP87 calculations (not simplified tables), supports 10 house systems (vs 1 for most apps), and shows you WHY transits affect you — not just vague predictions. We also cost less: £4.99/mo vs $12.99+ for competitors.
Ready to see your complete birth chart?
Enter your birth date, time, and location to generate your full natal chart with all planetary positions, house placements, and aspects. This free natal chart calculator returns results in seconds with VSOP87 precision.
Generate my birth chart — freeFree account. No credit card required.