Which one do I need?
- Your whole chart — planets, houses and aspects on a wheel: the birth chart calculator, with Placidus, Whole Sign or Equal houses.
- A Vedic chart in North or South Indian style, with nakshatras and your current dasha: the kundli calculator.
- Only your Ascendant, the sign rising in the east when you were born: the rising sign calculator. It needs an accurate birth time.
- Only your Moon sign, Western or Vedic (Rashi): the moon sign calculator. The date is often enough.
- Today’s sky — every planet’s sign, the retrogrades and the Moon’s sign right now: current planetary positions.
Western or Vedic?
Western astrology measures the signs from the equinox (the tropical zodiac); Vedic astrology measures them from the fixed stars (the sidereal zodiac). The two are about 24° apart today, so most placements fall a sign earlier in a Vedic chart. The kundli, and the Vedic switch where a tool offers one, use Lahiri’s ayanamsa, the Indian standard.
How accurate are they?
The positions are computed in your browser from a published planetary theory and checked against the Swiss Ephemeris, the reference astrologers use. The birth time is converted through your city’s time-zone history, including old daylight-saving rules — the most common source of a wrong chart.
These tools and the AstroGPT app
The calculators are tools of this site. The AstroGPT app does something different: you ask a question, and it reads the answer in a horary chart cast for the moment you ask. Thehorary astrology guide explains how such a chart is read.
Have a question for the stars?
AstroGPT casts the chart the moment you ask and explains the judgment.