Paint & Wallpaper Calculators and Guides
Estimate paint and wallpaper for a room from its wall and ceiling area, openings and number of coats. The guides explain how far a gallon of paint goes, when you need primer and a second coat, and how a wallpaper pattern repeat changes the number of rolls.
Calculators for paint & wallpaper projects
CalculatorPaint Calculator
Estimate how many gallons of paint you need for a room from its size, the number of doors and windows, and the…
CalculatorWallpaper Calculator
Work out how many rolls of wallpaper you need for a room from the wall size, the roll size and the pattern…
CalculatorPrimer Calculator
Work out how many gallons of primer you need for the walls and ceiling of a room, with coverage for new drywall…
CalculatorCeiling Paint Calculator
Estimate how much ceiling paint you need from the room size, the number of coats and whether the ceiling is smooth or…
Paint & wallpaper guides
GuideHow Many Coats of Paint Do You Need?
Most interior walls need two coats of paint, plus a coat of primer on new drywall, bare wood, stains or a big…
GuideWallpaper Pattern Repeat: Straight Match, Drop Match and Waste
The pattern repeat is the vertical distance before a design repeats. Straight match, drop match and random match explained, and how a…
GuideHow Much Does a Gallon of Paint Cover?
A gallon of interior wall paint typically covers 350 to 400 square feet per coat, a quart about 100 sq ft and…