Calculated from real astronomyNot guessed from a date range or generated by AI.
FREE BIRTH CHART CALCULATOR
Free Birth Chart Calculator
Calculate your tropical natal chart, see useful personal context, and keep time-dependent details honest.
Private by defaultYour birth details never appear in a public URL.
A useful result before signupSee the first personal insight before creating an account.
YOUR CHART, EXPLAINED
What a birth chart can show
A birth chart is a map of the sky for the moment and place you were born. In Western tropical astrology, it brings planetary signs, houses, angles, and aspects into one view rather than reducing you to a single zodiac sign.
What does a birth chart show?
A birth chart shows where the Sun, Moon, and planets were positioned by zodiac sign and degree at birth. With a reliable birth time, it can also show the Ascendant, Midheaven, houses, and the planets' relationships to those local angles.
Aspects describe measured angular relationships between chart points. They help show where different parts of the chart reinforce one another, pull in different directions, or require conscious coordination.
What information do I need?
You need a birth date and a resolved birthplace. Add your recorded birth time when you have it, or mark the time as unknown so the result does not imply precision your source data cannot support.
Why does birth time matter?
Birth time anchors the chart to the local horizon. It is required for a reliable Rising sign, Midheaven, and house structure, and it can affect the Moon's exact degree or sign on days when the Moon crosses a sign boundary.
What can be calculated without a birth time?
Most planetary sign placements can still be calculated from the birth date and place. Selyune omits the Ascendant and houses, leaves out unsupported Moon aspects, and labels any remaining time-related uncertainty instead of substituting a made-up time.
Does AI calculate the chart?
No. Selyune calculates chart facts before any AI interpretation. The language layer may explain structured placements, houses, aspects, or transits, but it is not asked to invent them.