Get the exact amount of paint you need for your walls. Our free paint calculator includes coverage estimates and cost calculations.
Wall Area
384.00 sq ft
Gallons Needed
1.9 gal
Estimated Cost
$67.20
Most paint covers about 400 square feet per gallon. Always buy a little extra for touch-ups later.
Paint estimates usually start with the project area or volume, then add a waste factor before converting the result into bags, pieces, bundles, panels, or gallons. Use this calculator when you need a fast material estimate before ordering supplies, comparing costs, or planning a construction project.
Contractors, builders, remodelers, and DIY homeowners who need a practical jobsite estimate.
Start with the dimensions of the project, then choose material settings, price, and waste percentage.
The basic workflow is to calculate wall area, subtract openings, check coverage, then round up so you do not run short during installation.
One gallon typically covers 350-400 square feet with one coat. For textured surfaces or dark colors, coverage may be less (250-300 sq ft).
Calculate the total wall area, subtract windows and doors, then divide by the paint coverage (typically 350-400 sq ft per gallon). Multiply by number of coats.
Measure each wall: height × width. Add all walls together for total surface area.
Measure and subtract the area of windows, doors, and other openings.
Check the paint can for coverage rate - typically 350-400 sq ft per gallon.
Multiply by 2 for two coats, which is recommended for most painting projects.
Always round up to the next whole gallon for convenience.
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