How much area does a gallon of paint cover?

About 350 sq ft per coat on smooth, primed surfaces.

Most color changes need two coats; same-color refreshes may need only one.

Paint Calculator

Enter your total wall length, ceiling height, number of coats, and openings to deduct. Get the paintable area and gallons needed.

Estimates only. Round up and buy a little extra to account for waste, spills, and breakage.

Gallons = (paintable area × coats) ÷ 350. Each opening deducts ~21 sq ft.

How much area does a gallon of paint cover?: About 350 sq ft per coat on smooth, primed surfaces.
Do I need two coats?: Most color changes need two coats; same-color refreshes may need only one.

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