The Paint Needed for a Wall or any rectangular area calculator computes the number of gallons of paint and primer needed to cover a rectangular area.
INSTRUCTIONS: Choose units and enter the following:
Wall Paint (WP): The calculator returns the gallons of paint or primer needed to cover the wall area. The calculator also returns the surface area of the wall in square feet. However, these answers can be automatically converted to compatible units via the pull-down menu.
To estimate the cost of paint or primer for a wall,CLICK HERE.
The surface area of a wall (blue in diagram) is based on the length and height. The mean square feet for a gallon of quality paint is 400 ft2 . Primer covers 200 ft2. The gallons of paint and primer are the total surface area divide by the square feet per gallon.
To compute the surface area of a wall,CLICK HERE. The surface area is then reduced by 15 ft2 for each window and 21 ft2 for each door.
One should use the pricing for paint or primer that can be bought locally since prices may vary. However, the following prices are recent U.S. dollar costs for one gallon of paint or primer in the United States: