Painting Cost Calculator

As a general rule of thumb, one gallon of paint will cover about 350-400 square feet of smooth, primed surface with one coat. For an average 10x12 foot room with 8-foot ceilings, you'll likely need about one gallon for a single coat on the walls.

For a quick estimate, it's often easier not to subtract them. This builds in a small buffer of extra paint for touch-ups or if the surface is more porous than expected. For a more precise calculation on a large project with many openings, you can subtract the area of each window and door.

A second coat ensures a uniform, richer color and a more durable, washable finish. The first coat often soaks into the wall unevenly, creating a blotchy appearance. The second coat corrects this, providing a professional and long-lasting result.

Yes, but usually not by a significant amount. Flatter (matte) paints tend to have slightly lower coverage rates because they are more porous. Glossier finishes (satin, semi-gloss) are less porous and may spread a little further. However, the manufacturer's stated coverage on the can is the best guide.

Using a primer is highly recommended, especially on new drywall, stained surfaces, or when making a drastic color change (e.g., painting a light color over a dark one). Primer seals the surface, blocks stains, and provides a uniform base, which can improve the topcoat's coverage and finish, sometimes saving you from needing an extra coat of expensive paint.

Labor costs vary widely based on location, the complexity of the job, and the painter's experience. A common method is to estimate labor as 2 to 4 times the material cost. Alternatively, painters may charge per square foot (e.g., $2-$6) or a daily rate. The best way to get an accurate labor estimate is to get quotes from local professionals.