Sherwin-Williams paint calculator

Estimate Sherwin-Williams paint gallons and cost before you buy.

Enter your room size, then CoatWise estimates how many gallons of Sherwin-Williams paint you need, primer, supplies, and total project cost. Defaults use a typical SW price and coverage rate; adjust them to your exact SW line and any pro discount.

Paintable area

Room dimensions Total square feet

Room length, ft Room width, ft Wall height, ft Rooms like this

Doors to subtract Windows to subtract Include ceiling Include primer coat

Sherwin-Williams assumptions

Finish coats Coverage per gallon, sq ft SW price per gallon Primer price per gallon Supplies budget Waste factor, %

Emerald often runs ~$90/gal at retail; SuperPaint and Duration sit around $50-70/gal. Pro accounts and sales commonly discount 30-40%, so enter the price you actually pay.

Labor estimate

Labor rate per sq ft Minimum labor charge

Set labor to 0 for a DIY material-only Sherwin-Williams estimate.

Paint roller, tray, and color swatches for a Sherwin-Williams interior project

Pick your SW line first. Emerald, Duration, SuperPaint, and ProClassic each cover a little differently.

Sherwin-Williams cost breakdown

Materials, primer, and labor

Line item	How it is estimated	Amount

Sherwin-Williams interior lines and coverage

Sherwin-Williams sells several interior lines. Emerald is the top tier with strong hide and stain resistance. Duration is a durable mid-premium choice, SuperPaint is the popular contractor-grade workhorse, and ProClassic is used for trim and cabinets. Coverage for most SW interior paints lands near 350 to 400 square feet per gallon on smooth, primed walls.

Retail vs pro pricing

SW paints are sold at full retail in stores, but painters with a PRO account and seasonal sales often pay 30-40% less. Enter the price you actually pay so the estimate reflects your real cost, not the shelf sticker.

How to plan an SW project

Start with room dimensions for a bedroom, living room, or office. Switch to total square feet if you already measured wall area from a floor plan. Include the ceiling only when you are painting it too, and add primer when bare drywall, stain blocking, or a big color shift is involved.

DIY vs professional

For DIY, set labor rate to 0 and budget SW paint, primer, tape, rollers, trays, and drop cloths. For a pro quote, enter a local labor rate per square foot and a minimum charge.

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Sherwin-Williams paint calculator FAQ

How much does a gallon of Sherwin-Williams paint cover?

Most Sherwin-Williams interior paints cover about 250 to 400 square feet per gallon. Emerald and Duration are premium lines with strong hide, while SuperPaint and ProClassic are common mid-tier choices that typically cover around 350 to 400 square feet per gallon on smooth walls.

How many coats of Sherwin-Williams paint do I need?

Two coats is standard for even color and durability. Emerald and Duration are marketed for excellent hide and may reach full coverage in fewer coats on a close color match, but a second coat is still recommended for dark-to-light changes.

Does the calculator include Sherwin-Williams primer?

Only when you check "Include primer coat." Priming bare drywall or making a big color change usually needs a separate primer gallon, which the estimate adds at the primer price you enter.

Is this an official Sherwin-Williams tool?

No. CoatWise is an independent paint planning calculator and is not affiliated with, endorsed by, or sponsored by The Sherwin-Williams Company. Always confirm coverage and price on the SW product label before buying.

Independent tool. CoatWise is not affiliated with The Sherwin-Williams Company. Paint coverage and price vary by SW product line, surface, and region. Verify the numbers on the can label and at your retailer.