Birth chart calculator — your Sun, Moon and rising sign, with the wheel

The Sun sign is the zodiac sign the Sun occupied when you were born — the one newspaper horoscopes use. The Moon sign is where the Moon was, which changes every two and a half days. The rising sign, or ascendant, is the sign coming up over the eastern horizon at your birth place and minute. Astrologers read all three together; the Sun alone is a twelfth of the picture.

For the rising sign and the houses, yes — an hour's error can change the rising sign. For the Sun, the planets and usually the Moon, a date and a rough time are enough. Tick 'time unknown' and the tool shows what still holds and leaves out what does not.

Whole-sign houses: the rising sign is the first house, the next sign the second, and so on. It is the system of Hellenistic astrology and of Vedic practice, and the only one that needs no table of house cusps. Software defaulting to Placidus may place a planet near a boundary in a different house.

Vedic astrology uses the sidereal zodiac, fixed to the stars, while Western astrology uses the tropical zodiac, fixed to the equinox. Precession has pulled them about 24° apart, so most people's Sun is one sign earlier in the Vedic reckoning. Both are correct in their own system; the chart shows the two together.

Every reading here answers the same three questions the tradition answers: what the placement shows (क्या), when it applies (कब) — the dasha, the transit, the window of the day — and what to do about it (क्या करें). The words are the app's own, from Brihat Parashara Hora Shastra and Saravali, and they describe rather than promise.

Under every result, 'What to do' checks the grahas that matter most in it — exalted or debilitated, own sign, combust, the house it sits in — and gives the classical practice only for a graha that is weak or afflicted: a mantra, its weekday, a fast or a charity, with the Lal Kitab everyday version, word for word from the Jyotish app's graha guide. A strong graha is named as strong and left alone, because the tradition gives no remedy for it. All practices are free and done at home. Nothing is sold, no gemstone or puja is recommended, and none of it is medical, financial or legal advice.

No. The date, time and place you enter are used by your own browser to compute the chart — load the page, switch off Wi-Fi, and it still works. If you switch the page to another language, only the page's fixed text is sent to our translation service; your chart, your birth details and the chat stay in English and are never sent. The details are kept in this browser so the page remembers them next time; clear them with the Reset button.

The Sun is computed from the Meeus low-precision series (about 0.01°), the Moon from the 27 largest terms of the ELP series (a few arcminutes), and the planets from the JPL Keplerian elements published for 1800–2050 (about an arcminute). All of that is far tighter than a birth time rounded to the nearest five minutes, which moves the ascendant by more than a degree. Rahu is the mean node. The ayanamsa is Lahiri, modelled linearly from its J2000 value, accurate to about 0.01° in the current era.

Yes. The website's engine is a line-for-line port of the app's, and the build fails if the two disagree on any of five reference charts to a millionth of a degree. The app adds what a page cannot: questions in your own words in eight languages, Kundli Milan, Lal Kitab and numerology.