Free Birth Chart Calculator

Discover your Sun, Moon, and Rising — calculated with the Swiss Ephemeris from your exact birth data.

Date of birth

Time of birth

Optional — needed for Rising sign

Place of birth

What is a birth chart?

A birth chart — also called a natal chart — is a map of the sky at the exact moment you were born. It shows the positions of the Sun, Moon, and planets across the 12 zodiac signs and 12 astrological houses. It is the foundation of all personalized astrological interpretation.

The Big Three

The three most important placements in your chart: your Sun sign (your identity), Moon sign (your emotions), and Rising sign (your public face). Together, they form the core of your astrological profile.

Why birth time matters

Your Rising sign changes roughly every two hours. Without an accurate birth time, your Ascendant and house placements cannot be determined with certainty. Your Sun and Moon signs remain accurate from the date alone.

Real astronomical accuracy

AstroStella uses the Swiss Ephemeris — the astronomical computation engine used by professional astrologers worldwide. Every planetary position is calculated from JPL's (NASA) DE431 ephemeris data, accurate to sub-arcsecond precision. No approximations, no simplified lookup tables — the same calculations used by astronomical observatories.

Want the full analysis?

AstroStella generates a full AI interpretation of your chart — personality, aspects, transits, and more — right in the app.

Download AstroStella