NRIs comparing free kundli tools, including well-known names like AstroSage, often end up choosing based on which site looks more polished rather than which one is actually computing the chart correctly for a birth outside India. A short technical checklist is more useful than a general reputation comparison.

Questions worth asking any tool, including this one

  • Which ephemeris does it use? This site computes positions with a high-precision astronomical ephemeris. Ask the same question of any tool you are considering.
  • Which ayanamsa, and is it stated? This site uses Lahiri ayanamsa, the most widely used standard in India. A tool that does not disclose its ayanamsa makes it hard to know why two tools might disagree on a placement.
  • Does it handle historical time zones and DST correctly for foreign cities? This matters specifically for NRI users: a birth in a US, UK or Gulf city needs the correct historical daylight-saving rule for that exact date, not just today’s rule. This site uses IANA timezone data (tzdata) for this.
  • Does global city search work well, or is it India-focused? Some tools list Indian cities exhaustively but handle foreign cities poorly (missing smaller towns, wrong coordinates). This site uses open geocoding search that covers any city worldwide.

Why this matters more for a foreign birth

A birth in a major Indian city is a well-tested case for almost any tool. A birth in a smaller US or UK town, especially one whose time zone rules changed decades ago, is a much better stress test of whether a tool’s underlying computation is actually careful.

What a one- or two-degree disagreement usually means

If two tools agree on the rashi and nakshatra but list the lagna or a planet’s degree slightly differently, the most common cause is a small difference in the ayanamsa value used, since Lahiri ayanamsa itself has had minor revisions over the decades, and a tool using an older constant can drift by a fraction of a degree from one using the current value. This kind of gap rarely changes the sign itself. A bigger disagreement, where the two tools land in different signs entirely for the lagna, points to something more fundamental: a wrong birth time zone, a DST rule applied incorrectly for the birth date, or a coordinate lookup that resolved to the wrong town. Sign-level disagreements are worth chasing down; sub-degree ones usually are not.

A concrete way to stress-test any tool

Pick a birth city and date where the local time zone rules actually changed at some point, for example a US state that adjusted its DST observance decades ago, or a birth date that falls in a war-time or transitional period when a country’s standard time itself shifted. Enter the same details into two or more tools and see whether they agree. A tool that gets the easy, well-tested cases right but disagrees on an edge case like this is telling you something real about how carefully its historical time zone data was built, which matters far more for an NRI birth abroad than for a birth in a major Indian metro, where almost every tool gets it right by default.

Run the comparison yourself

Enter the same birth details on the kundli tool here and on any other tool you are evaluating, and check whether rashi, nakshatra and lagna agree. If they do not, ask both tools which ephemeris and ayanamsa they used before assuming either one is wrong.