how much does interior gallon of paint cover
To determine the amount of paint required to cover a wall, multiply the height of the wall by its length, then divide by 400. This means a gallon of paint will cover a 10 X 15-foot room (two 10-foot walls and two 15-foot walls, 8 feet high) with one coat. Two coats will take 2 gallons. However, there are other factors you should consider when calculating coverage.