Paint & Wallpaper Quantity Calculator

Estimate the paint or wallpaper you need from your wall dimensions.

Paint quantity

Wall height ftTotal wall width ftDoors area ft²Windows area ft²Number of coats Coverage per gallon ft²Waste allowance %

—

Wallpaper quantity

Wall height ftTotal wall width ftDoors + windows area ft²Roll width inRoll length ftPattern/waste allowance %

—

Compare finishes

Wall height ftTotal wall width ftOpenings area ft²Paint coverage ft²/galPaint coats Paint waste %Wallpaper roll width inWallpaper roll length ftWallpaper waste %

Wall area

Wall height ftTotal wall width ftDoors area ft²Windows area ft²

—

Quick reference

Paint coverage

A common planning figure is around 350–400 ft² per gallon per coat. Always check the product label.

Two coats

Multiply the net wall area by the number of coats before dividing by coverage.

Wallpaper rolls

Roll yield depends on roll width, roll length, ceiling height and pattern repeat.

Waste allowance

Pattern matching and cutting can increase wallpaper needs. Use a higher allowance for complex patterns.

These calculators provide planning estimates. Confirm the manufacturer's coverage, roll yield and installation instructions before purchasing.