Paint Calculator

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Have you ever been "almost done" painting, and realized you didn’t quite have enough paint to finish the job? Fill in the blanks below, and click 'Calculate' to calculate the right amount of paint for your project.

One Paint Can
One can of paint will cover up to 400 square feet, which is enough to cover a small room like a bathroom.
Two Paint Cans
Two cans of paint covers up to 800 square feet, which is enough to cover an average size room. This is the most common amount needed especially when considering second coat coverage.
Three Paint Cans
Three cans of paint covers up to 1200 square feet. This is enough to cover a large room or a couple average sized rooms adjoining each other. You may want to consider this extra can if you are doing a room with vaulted ceilings.
Four Paint Cans
Four cans of paint covers up to 1600 square feet, which is enough to cover several average rooms. You might consider this amount if you have a great room or some other very large room(s).
Interior
Exterior
Total Room Perimeter
Measure around the base of each of the walls in the room and add all the lengths together. Be sure to include door and window areas.
Room Height
Measure the height of the tallest wall in the room.
Total Gable Length
Measure the length of any triangle gables that make up the roof of the house if they are also being painted.
Gable Height
Measure the height of any triangle gables that make up the roof of the house if they are also being painted.
Doors
Count the individual number of doors in the room that *will not* be painted. Count double doors twice.
Windows
Count the individual number of large and small windows around the outside of the house. Count multiple times for very large bay windows.

Total for Walls
 sq. ft.
 Gallons