The Paint for a Wall or any rectangular area calculator computes the number of gallons of paint and primer needed to cover an area defined by a length and height or width.
INSTRUCTIONS: Choose units and enter the following:
- (L) Length
- (H) Height or Width
- (PC) Coverage per Gallon (area covered by one gallon: default 400ft2)
- (CT) Coats of Paint
- (WD) Number of Windows
- (DR) Number of Doors
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.
The Math / Science
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.
Paint Calculators
- Paint for a Room: Computes the number of gallons of paint or primer
needed to paint an entire room, the four walls and ceiling and also for just the walls. - Room Paint Cost: Estimates the cost of paint or primer needed to cover a rectangular room (blue in diagram) based on the length, width and height of the room.
- Paint for a Wall: Computes the number of gallons of paint or primer needed to paint a wall or any rectangular area (wall or ceiling).
- Cost to Paint a Wall: Estimates the cost of paint or primer needed to cover a wall or other area defined by a length and a height or width.
- Ceiling Paint Cost: Estimates the cost of paint or primer needed to cover a ceiling of a rectangular room based on the length and width of the room.
- Exterior Paint for a House: Computes the number of gallons of exterior paint for a gabled building like a common house based on the dimensions, number of large and small windows, number of doors and the number of coats of paint
- Wood Stain Calculator: Computes the amount of wood stain to finish wood surfaces based on a length, width and the stain product coverage defined by a container size and coverage per container.
- Deck Stain and Sealer: Computes the number of quarts of stain and sealer needed for a deck based on the size and whether rough or smooth.
- Paint for Pipes: Computes the amount of paint needed to cover the exterior surface area of one or more pipes based on the pipe diameter, length, number of coats, number of pipes and the recommended area coverage of the paint.
- Paint for Corrugated Surfaces: Computes the amount of paint needed for a corrugated surface based on the dimensions of the corrugated surface area (length and width), a corrugation factor, coverage per gallon of paint used and the number of coats of paint.
- Paint Pricing Survey: Dataset containing a history of periodic pricing for paint products including primer and three price points (economy, medium and premium) paint. Data comes from nationally advertised prices on the website of national retailers.