Private calculation · exact ephemerides
Birth chart calculator.
Your personal birth chart with planets, houses, angles, and aspects—and your personal data never leaves your device.
Your chart
Your birth chart
Planets and points
| Body | Position | Decan | Motion | House |
|---|
Aspects
| Pair | Aspect | Orb |
|---|
Frequently asked questions
The birth chart in short
What the calculation includes, why the exact birth time helps, and how privacy is handled.
What does the birth chart include?
A complete natal chart: the positions of the Sun, the Moon, and the planets in signs, degrees, and decans, the rising sign and midheaven, twelve houses, and the aspects between bodies—drawn as a chart and laid out in clear tables.
Do I need my exact birth time?
Not necessarily. Without a time, the calculator computes the planetary positions for your birth day—signs, decans, and aspects. The rising sign and houses do depend on the exact hour, so the chart leaves them out when the time is unknown and tells you if a body changed signs during that day.
Is it free, and is my data safe?
Yes. The birth chart is free, the calculation runs directly in your browser, and your birth date and place are never sent anywhere. You can save the result as a link.
How accurate is the calculation?
Positions come from astronomical ephemerides computed for the exact moment and coordinates of your birth—including retrograde motion. Four house systems are available: Placidus, whole sign, equal, and Porphyry.