Birth Chart Calculator
Full natal chart: all planets from Sun to Pluto, lunar nodes, Lilith and the 12 Placidus houses — with PDF download.
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Planet Positions
Houses (Placidus)
What Is a Birth Chart?
A birth (natal) chart is a snapshot of the sky at the moment you were born. This tool computes its three pillars with real astronomy: the Sun sign (the Sun's ecliptic position — core identity in astrology), the Moon sign (emotions; the Moon changes sign every 2–2.5 days, so birth time matters) and the rising sign / ascendant (outward persona; changes every ~2 hours, so exact time and place are essential).
Positions are calculated with Meeus solar and lunar algorithms and a sidereal-time ascendant formula — the same math used by astronomy software, accurate to well under a degree for the Sun and Moon. You can download your chart summary as a PDF. Offered for entertainment.
Frequently Asked Questions
What do I need to know for an accurate chart?
Birth date, the exact time (from your birth certificate if possible) and the city. The Sun sign needs only the date; the Moon sign benefits from the time; the ascendant strictly requires exact time and place.
Is my data stored when I download the PDF?
No. All calculations and the PDF itself are generated inside your browser; nothing is sent to a server.
Why might my ascendant differ from other sites?
Rounded birth times, daylight-saving assumptions and different house systems cause small discrepancies. Near a sign boundary, minutes matter — check whether DST applied on your birth date.
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Birth Chart Calculator