Paint Calculator

A standard gallon of wall paint covers approximately 350 to 400 square feet. This is typically enough to paint a small bathroom or hallway with one coat, or apply a single touch-up layer to a medium-sized bedroom.

For almost all DIY projects, two coats of paint are recommended. The first coat gets absorbed by the wall and creates the base, while the second coat guarantees rich color depth, hides base colors, and provides a durable finish.

Yes. Deducting door and window spaces is a smart way to avoid buying excess paint you will not use. Our calculator deducts a standard 21 square feet per door and 15 square feet per window from the gross area.

Usually, yes. Ceilings are calculated separately by multiplying room length by width. They are typically painted with flat white latex paint, which hides imperfections, while walls are painted with satin or eggshell finishes.

To estimate trim paint, measure the total linear length of baseboards and door casings. Multiply that linear length by 0.5 to get the square footage. A single quart of semi-gloss trim paint is normally plenty for a standard room.