A gallon of paint typically covers about 350-400 square feet which is enough to cover a 10-foot-by-10-foot (100 square feet) room, however depending on wall texture and desired coverage, having a little more than a gallon on hand may be best.
How to Use Paint Calculator
Preparing for a paint project? Use our paint calculator to figure out how much paint you'll need.
Which Calculation Is Right for Your Project?
Quick Calculation
Painting just one simple room or a statement wall? Use our Quick Calculation option.
Custom Calculation
If you're painting a space with baseboards, ceilings or crown moldings to account for, choose our Custom Calculation option.
Deck Calculation
If you're painting a porch or deck, choose our Deck Calculation option.
Note: Product requirements will vary according to factors such as application method and surface type or condition. To verify product amounts, visit your neighborhood Sherwin-Williams store and speak with a representative.
Paint Calculator FAQs
A quart of paint covers 100 square feet which is enough paint to complete an accent wall project or give a door a pop of color.
A gallon of primer covers about 200-300 square feet, which is enough primer for a 10-foot-by-10-foot and 12-foot-by-12-foot room.
Spray paint cans come in different sizes so how much a can will cover varies. As a general rule, a 4.5 ounce can covers 7 square feet, an 11 or 12 ounce can covers 20 square feet and a 16 ounce can covers about 30 square feet.
To determine how much paint you need, you need to calculate the square footage. To find the square footage, measure the length and width of your project and multiply those numbers together to get your square footage. For example, a 10-foot-by-10-foot room is 100 square feet and a 12-foot-by-12-foot room is 144 square feet.
Sign Up for PaintPerks®
Sherwin-Williams PaintPerks is an exclusive program designed to help you with your at-home projects.
Sign Up for PaintPerks®
Sherwin-Williams PaintPerks is an exclusive program designed to help you with your at-home projects.
