Interior Calculators
Plan interior projects with calculators for paint, tile, flooring and drywall. Enter your room size and get the gallons, tiles, boxes or sheets you need, with sensible extra for cuts and waste.
- Carpet CalculatorFind out how much carpet to buy for a room.
- Drywall CalculatorEstimate how many drywall sheets you need for a room, with or without the ceiling.
- Flooring CalculatorWork out how many boxes of laminate, vinyl plank or engineered hardwood you need for a room.
- Paint CalculatorWork out how much paint you need for a room, a single wall or a ceiling.
- Tile CalculatorFind out how many tiles you need for a floor, a backsplash or a shower wall.
- Wallpaper CalculatorWork out how many rolls of wallpaper to buy for a whole room or a single accent wall.
Popular questions
Measure once, use everywhere
Most interior calculators start from the same three numbers: room length, room width and wall height. Write them down once and you can price paint, flooring and drywall for the same room in a couple of minutes.
Why the extra percentage matters
Tiles and planks are cut at every wall, and some pieces break. Buying 10% extra (15% for diagonal layouts) avoids a second trip — and makes sure everything comes from the same production batch.