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Paint Calculator for Walls
Estimate wall area and gallons of paint needed for a room.
Paint Calculator for Walls result
● ToolEnter your information below
Wall area256 sq ft · 23.78 m²Coverage for all coats256 sq ft · 23.78 m²Recommended paint4 gal
Subtract large openings if needed. Texture, color changes and application method can increase paint use; confirm the can label.
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How this tool works
Paintable wall area is room perimeter × wall height minus standard door and window openings. Coverage, coats, ceiling, and primer choices determine whole gallons.
Limits to know
Coverage is an entered assumption, not a promise. Surface texture, porosity, color change, application method, product instructions, spills, and touch-ups can change the gallons required.