In a standard Rashi chart (birth chart), the first house (Lagna) starts at a specific degree of a sign (e.g., 15° Aries). Each subsequent house is exactly 30° later (e.g., 15° Taurus for 2nd house, etc.). However, this is a simplification.
In this case, Sun and Mars in the Chalit chart. This dramatically alters predictions: bhav chalit chart calculator
Since each house is 30 degrees, the midpoint of the subsequent houses is calculated by adding 30 degrees successively to the Ascendant degree. In a standard Rashi chart (birth chart), the
The calculation of the Bhav Chalit chart relies on the (Sripati Paddhati is common, but Bhav Chalit typically uses the equal house division from the Ascendant degree). In this case, Sun and Mars in the Chalit chart
In reality, houses in the sky are not perfectly aligned with signs. Houses are calculated based on the ecliptic coordinates and the local horizon at birth time and place. This means a house can start in the middle of a sign and end in the middle of the next sign.
The Rashi chart tells you which sign a planet is in. The Bhav Chalit chart tells you which house a planet is actually influencing.