Birth Chart Calculator — Sun, Moon and Every Planet

What a birth chart shows

A birth chart is the sky at the moment and place you were born. Your chart here is calculated from real astronomical data rather than estimated, so the positions match what an ephemeris says: your Sun, your Moon, every planetary position, and the aspects they make to each other.

Where this comes from

Planetary positions calculated from real ephemeris data, not approximated
Ptolemy — Tetrabiblos, and Vettius Valens — Anthology (Hellenistic, public domain)
House and aspect meanings from the modern psychological astrology tradition

How it works

Enter your date, exact time and place of birth.
The chart is calculated for that moment and location.
Each placement is read from the reference, then read as a whole.

Common questions

Why does my birth time matter so much?

The rising sign moves through all twelve signs in about 24 hours, and the houses move with it. An hour of difference can change which house a planet sits in, and that changes the reading.

What if I do not know my exact birth time?

You still get your Sun and, in most cases, your Moon sign. The rising sign and the houses will not be reliable without a time.

What do the Sun and Moon mean?

The Sun is what you are working toward. The Moon is what you need in order to feel settled. Read together they explain why what you want and what calms you are often not the same thing.

Is the birth chart free?

A full chart reading uses credits. A new account starts with 40 credits, so your first chart is covered.