Natal Chart Calculator
The whole of astrology starts here: the sky as it stood at the moment and place you were born, drawn as a wheel you can actually read.
What you get
- Planet positions to the degree, minute and second, with retrograde motion marked
- House placements in Whole Sign, Placidus, Regiomontanus or Equal — switched without recasting
- A full aspect grid and aspect lines on the wheel, with the orb tradition of your choice
- Essential dignities: domicile, exaltation, triplicity, terms and decan, plus mutual receptions
- Chart patterns detected automatically — Grand Trine, T-Square, Yod, Kite, Grand Cross, stellium
- Chart rulers: the Ascendant ruler, the almuten figuris, the hyleg
How it works
A natal chart is a map of one moment. The engine converts your birth time to Universal Time using the timezone and daylight-saving rules that were actually in force at that place on that date — not today's rules — then computes positions from the Swiss Ephemeris.
That conversion is where most free calculators quietly go wrong. Historical daylight saving is irregular and full of edge cases: clocks that went forward and made a time that never existed, and clocks that fell back and made an hour happen twice. The calculator detects both and asks you which hour you meant rather than guessing.
From there everything else follows. The houses divide the sky, the aspects describe how the planets regard one another, and the dignities say how much strength each planet has in the place it finds itself.