A: Our easy-to-use Paint Calculator tool takes the guesswork out of determining how much paint you'll need. Just enter the measurements of the surface to be painted and our tool will calculate the amount of gallons per coat needed. Make sure to include measurements for windows, doorways, and trim to return a more precise calculation.
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
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.
