Wallpaper Calculator
- Strips
- Strips per roll
- Strip length
- Area to cover
How to use
- Choose feet and inches, or metres and centimetres.
- Enter the width of each wall and the ceiling height.
- Add doors and windows, then the roll width, roll length and pattern repeat from the label.
How it works
The room is covered in vertical strips. Strip length is the wall height, rounded up to a whole pattern repeat if the paper has a pattern. Strips per roll = roll length ÷ strip length, rounded down.
Strips needed = wall width to cover ÷ roll width, rounded up. Doors and windows reduce the width to cover by their area divided by the wall height. Rolls = strips ÷ strips per roll, rounded up.
This is an estimate. Windows only save you paper when a whole strip falls inside them, so buying one spare roll is wise, particularly for patterned paper from a single batch.
FAQ
What is a pattern repeat?
The vertical distance before the design starts again. A larger repeat means more waste because each strip must line up with the last. Plain paper has a repeat of 0.
Why does a patterned roll cover less wall?
Each strip is cut to a multiple of the repeat, so offcuts that would fit a plain paper strip are lost.
Do I include the ceiling or skirting boards?
Use the height you will actually paper. Measure from the skirting board to the ceiling or picture rail.
Is a double roll the same as a single roll?
Enter the real length printed on the label. A double roll simply has a longer length.