Most astrology sites ask you to trust them. We'd rather show you the work. This page explains — in plain English — exactly how every chart, panchang, and Moon reading on this site and in our app is calculated, what we verified it against, and the ethical lines we won't cross.
Every calculation begins with the actual positions of the planets at your exact birth moment and place. Our engine uses the Swiss Ephemeris — the same astronomical dataset used by professional astrology software and derived from NASA JPL planetary models. It is accurate to fractions of an arcsecond over thousands of years.
Your birth city matters as much as your birth time: we resolve latitude, longitude, and the historically correct timezone (including daylight-saving rules for the actual year of your birth) from a database of more than 33,000 world cities before a single planetary position is computed.
Vedic astrology uses the sidereal zodiac — signs measured against the actual fixed stars. Western astrology uses the tropical zodiac, tied to the seasons. Because Earth's axis slowly wobbles (a 26,000-year cycle called precession), the two systems have drifted about 24° apart. That correction is called the ayanamsha.
We use the Lahiri ayanamsha — the standard adopted by the Indian government's calendar committee and by the vast majority of practicing Vedic astrologers. It's why your Vedic signs may sit one sign back from your Western ones. Nothing was taken from you; the map simply got more precise.
While building our engine we discovered that a widely used open-source Vedic library mislabeled its Lahiri setting, silently producing a different ayanamsha. We patched it at the source and verified the corrected output against professional software. Precision is a practice, not a claim.
We verified our engine, planet by planet, against Parashara's Light 9.0 — the desktop software professional Vedic astrologers have relied on for decades. The results:
✓All nine planetary positions matched to sub-arcsecond precision — a fraction of 1/3600th of a degree.
✓The ascendant (rising degree) matched exactly.
✓All nine major life-chapter start dates (the Vimshottari dasha sequence) matched to the day.
Charts in our app that meet this standard carry the Parashara-Verified badge. The free web calculators on this site use the same method with a browser-grade astronomical engine — accurate to well within what sign and mansion readings require, and boundary cases are flagged honestly rather than glossed over.
The Vimshottari system — we call the periods "chapters" — assigns each stretch of life to a planetary theme, and the entire 120-year sequence is anchored to one thing: the Moon's exact position within its lunar mansion at your birth. This is why we treat the Moon as the first fact of any chart, and why our free Moon Sign Calculator exists.
When we found a 618-day error in a popular library's chapter-start calculation, we replaced it with our own direct computation from the Moon's sidereal position — then re-verified every date against Parashara's Light.
Traditional panchang values — the lunar day, the Moon's mansion, auspicious and quiet hours — are properly reckoned from sunrise at your location, not from midnight in some distant city. Our panchang and lunar calendar follow that rule, so the "day" you read about is the day the tradition actually means.
Sanskrit terms carry centuries of meaning — and they can also build a wall. Our rule everywhere: English leads, the traditional term is one tap away. You'll read "lunar day 11 of 30" before Ekadashi, "the Moon's mansion" before Nakshatra, "your current chapter" before Dasha. Depth for those who want it; clarity for everyone.
✓No fear-based guidance. No "dangerous periods," no doom predictions, no red-alert days. Our calendars use gold, silver, and neutral — never red.
✓Peace of mind is never paywalled. If a chart pattern deserves awareness, the awareness and basic guidance are free. Always.
✓Honest precision. We show ranges and flag boundary cases instead of performing fake decimal certainty. When exact birth time matters, we say so.
✓Guidance, not prophecy. Astrology here is a mirror for reflection and timing — a tool for your judgment, not a replacement for it. It is not medical, legal, or financial advice.
Free, precise, plain-English — and the work is shown under every result.
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