How Much Do You Need To Paint A Room. 4211 x 2 76 litres. The average cost to paint a room is 350.
Start by adding the length of each wall. Allowing for two coats of paint check the paint packaging to see how much paint youll need. Dont worry about subtracting doors and windows as its always good to have a little extra.
Estimates range between 350 to 400 square feet per gallon of paint on smooth interior plaster walls.
For a single room the job shouldnt take any longer than a few hours but often the tradesman will leave and come back the next day to apply a second coat. The best idea would then be to purchase 8 litres giving enough paint to complete the job and sufficient to go back if touch up is required later. In this example you would need slightly less than 2 gallons of paint to cover the walls with a single coat. To find the area of a wall we multiply wall height by wall width.