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Paint Calculator
Estimate paint quantity with editable coverage and opening deductions.
Calculator inputs stay on this page.
Estimate only. Adjust inputs for your product and check local requirements before buying or building.
Paintable wall area301.0 sq ft
Adjusted coated area662.2 sq ft
Estimated paint2.00 gal
One-gallon cans2 cans
Constants status
Market start: United States
Profile: United States
Sherwin-Williams paint calculator FAQ: Supports the US coverage default: one gallon typically covers about 350-400 sq ft. Door/window deduction areas are visible, user-editable estimating inputs. Verified 2026-09-03.