Wallpaper Calculator
Find how many rolls of wallpaper a room or wall needs, allowing for the pattern repeat, with the cost.
Change the values and press Calculate to work out your own figures.
A whole room
Enter the room's size and choose the roll.
Show the working
- rolls = (wall area − openings) ÷ usable coverage, rounded up
One wall
Enter the wall's width and height.
Show the working
- rolls = (wall area − openings) ÷ usable coverage, rounded up
How to use it
Enter the room's size and choose the roll. Enter the wall's width and height.
Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.
Key facts
rolls = (wall area − openings) ÷ usable coverage per roll, rounded up
Pattern repeat
The larger the repeat, the more is cut off each strip to match. Order 10–20% extra, all from the same batch.
Questions
How many rolls for a 12 × 9 ft wall with a 6 in repeat?
5 rolls (108 ÷ 25 sq ft).
Formulas
rolls = (wall area − openings) ÷ usable coverage per roll, rounded up
Sources
Limitations
- Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
- Tank results are the geometric volume; real tanks have wall thickness and fittings.