Valspar Signature paint coverage — gallons & coats

200–400 sq ft per gallon is a coverage range

The Valspar Signature Interior Paint + Primer page records that range and recommends two coats. Our default uses 200 sq ft per US gallon. For 332 sq ft of paintable walls, two coats require 664 ÷ 200 = 3.32 US gallons before extra allowance.

Why floor area can underestimate paint

A 12 × 10 ft room has a 120 sq ft floor. With eight-foot walls, its gross wall area is 352 sq ft; subtract doors and windows to get the paintable surface.

Sizes are not verified prices

The manufacturer lists quart, one-gallon and five-gallon containers. Colour, sheen, local stock and store prices need confirmation. Enter prices for every size to compare costs. The product name does not automatically remove the need for separate primer.

Calculate paintable wall area, not floor area

For a rectangular room, multiply its perimeter by wall height, then subtract the total area of doors and windows. Add separate rooms before calculating containers when they share one paint colour.

A worked wall-paint example

12 × 10 ft with 8 ft walls: 2 × (12 + 10) × 8 = 352 sq ft of walls. Subtract 20 sq ft of openings to get 332 sq ft. At 350 sq ft per gallon and two coats, the exact estimate is 664 ÷ 350 = 1.897… US gallons. Two one-gallon cans cover that illustrative estimate.

Coverage and coats change the result

Manufacturer ranges use their lower coverage value by default. A quoted “up to” coverage is not a guarantee on every surface. Check porosity, colour change, application method and preparation; adjust the form to your current label.