Most Bhava chart calculators use one of three primary house-division systems to calculate the "starting" and "ending" points of each house:
: A traditional Vedic method where house sizes can vary based on the latitude of birth. KP System (Placidus)
A Bhava chart calculator is not a single formula but a choice of several mathematical models. The most common and respected system in South Indian Vedic astrology is the . Here’s a simplified breakdown of how the calculator works:
A (or Bhava Chalit) focuses on the actual mathematical division of houses rather than just the zodiac signs. Unlike a standard Rashi chart where each house is a fixed 30-degree sign, a Bhava chart shifts planet placements based on the exact degree of the Ascendant (Lagna) to show which house a planet functionally influences. Core Technical Features
Notice a critical point: The 1st house might span from 3° Gemini to 10° Cancer (approximately 37° of zodiac), while the 10th house might span only 26°. This is the real sky.
