Calculate the length and breadth of each room's walls. For example, a square-shaped room may have walls that are 10 feet high and 12 feet wide.
To get the wall's square footage area, multiply the wall's height by its breadth, such as 10 x 12 for 120 square feet, or 120 x 4 for 480 square feet, for a room's four walls.
You may subtract the minimum required areas for a door and window, which are 15 and 20 square feet, respectively. This leaves a total wall space of 445 square feet that has to be painted. Total 445 + 120 = 565 square feet after adding the 120 square feet of the ceiling.
As 3 liters of paint typically covers 350 square feet in one coat, the estimate divides the total square footage by 350 to obtain 3 liters of paint coverage per square foot. Mathematical calculations like 565 * 350 = 5 liter (approx) for a single coat and 1.6 * 2 = 10 liter (approx.) for two coats are required.
The amount of paint required to paint a particular area may be determined using these procedures as well. Choose the ideal paint for your project since it distinguishes your house and lasts a longer period.