Depending on the latitude and longitude of birth, a house can span less than 30 degrees or more than 30 degrees. This phenomenon, known as Varga or Viloma , causes planets near the border of a sign to "shift" houses in the Bhava Chalit chart.

This article will unpack everything you need to know: what the Chalit chart is, why the "Nirayana" system matters, how the calculator works, and—most importantly—how to interpret the results for deeper astrological insights.

The best calculators use Swiss Ephemeris data to ensure high precision. Because the Bhava Chalit chart shifts house boundaries based on your specific latitude and longitude, the "Nirayana" (sidereal) system requires exact coordinates. High-quality tools allow you to toggle between different house systems—such as Pripriani or Sripati—which is a major plus for advanced practitioners. User Interface and Accessibility