Natal chart
Build your natal chart, free
Enter a birth moment and the chart is cast from the Swiss Ephemeris — the same data professional software runs on. Nothing is saved unless you ask.
Placidus houses · tropical zodiac · true node
What it returns
- 11
- Bodies, from the Sun to Eris, with speed and station
- 12
- House cusps, in four systems, with a polar fallback
- 9
- Aspects, on an editable per-object orb table
- 1″
- Arc-second precision from the Swiss Ephemeris
Why it asks for a birth time
The ascendant advances about one degree every four minutes, so it crosses a whole sign in roughly two hours. A chart cast for the wrong hour is not slightly off — it has different houses, and every placement sits in a different part of life.
If the time is genuinely unknown, use 12:00. Planets are near enough right; treat the houses and the ascendant as unavailable rather than as answers.
And a birth place
Houses are drawn from the horizon at a specific latitude and longitude, and the timezone is derived from the coordinates rather than assumed — including the historical offset in force on that date.
Place search runs against a local gazetteer on our own server. No part of a birth moment is sent to a third party.
What you need
- 01
The date
Day, month and year of birth.
- 02
The time
Local clock time at the place of birth, as recorded.
- 03
The place
City or town. Coordinates and timezone are resolved from it.
The chart is the beginning, not the answer
The workbench adds transits, progressions, solar returns, synastry and horary — and reads the chart back to you in your own language.