Vedic astrology calculators that show their working

There are 91 calculators on this page - birth chart, dasha and timing, doshas, matching, panchang and muhurat, numerology and remedies. Each one opens with a form for your birth details and gives its result on the same page.

Yes. Every calculator shows its result on the page for free. Most also offer a longer PDF report: ₹99 in English or Hindi, or ₹129 for both languages. The Janam Kundli report is ₹249, or ₹299 for both languages.

From the Swiss Ephemeris planetary data files with the Lahiri ayanamsa, the mean lunar node, whole-sign houses for the birth chart (Placidus cusps where a calculator such as KP or Bhava Chalit needs them) and a Vimshottari year of 365.25 days. Before any change reaches this site, the engine has to reproduce 1,003 reference charts and the answers of every calculator exactly.

Almost always because of a setting, not a mistake: a different ayanamsa (Lahiri, Raman or KP), the true node instead of the mean node, another house system, or a wrong time zone - for example +5:30 used for a birth abroad or during India's war time. Our settings are listed in the answer above.

The birth place you pick carries its official time zone, and the UTC offset is worked out for your exact birth date and time, so daylight saving and India's Second World War time (+6:30) are applied automatically. Bombay before 1955 and Calcutta before 1948 kept their own local time; charts for those dates carry a warning so you can check how the time was recorded.

The ascendant changes sign about every two hours, so results judged by house can change with the time. Results that depend on the Moon - rashi, nakshatra, Sade Sati - usually hold for the whole day unless the Moon changed sign that day. The Birth Time Rectification calculator narrows the time from dates of known life events.