Interior calculators

Walls, floors and ceilings: measure the area, then work out paint, flooring, tile, drywall and wallpaper.

• Square Footage Calculator for Rooms and Odd ShapesFind the square footage of a rectangle, circle or triangle, multiply it across identical areas, and add a waste allowance before you order materials.
• Paint CalculatorEnter your room size, doors, windows and coats to see how much wall and ceiling paint to buy, in gallons and quarts or litres, and what it will cost.
• Flooring CalculatorTurn your room size into boxes of laminate, vinyl plank or hardwood flooring, using the coverage printed on the box and the right waste allowance.
• Tile CalculatorCount the tiles and boxes for a floor or wall from the surface size, tile size and grout joint, with a waste allowance for cuts and breakage.
• Drywall CalculatorCalculate how many 4×8, 4×10 or 4×12 drywall sheets a room needs, including the ceiling if you want, after doors, windows and waste.
• Wallpaper CalculatorCount wallpaper rolls strip by strip, so the pattern repeat is properly included. Works with US double rolls, single rolls and Euro rolls.