Wallpaper Calculator
Estimate how many rolls of wallpaper a room needs from its perimeter, wall height and the roll size. Enter room perimeter, wall height, roll width…
8 of 8 free uses remaining today
Estimate how many rolls of wallpaper a room needs from its perimeter, wall height and the roll size. Enter room perimeter, wall height, roll width and roll length to see strips needed, strips per roll and rolls needed when you calculate.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
With the default inputs (room perimeter = 14 m, wall height = 2.4 m, roll width = 0.53 m, roll length = 10.05 m), the results are: strips needed 27; strips per roll 4; rolls needed 7.
Quick reference: room perimeter vs result
Reference table based on the example values; it is not your calculation result.
| Room perimeter (m) | Strips needed | Strips per roll | Rolls needed |
|---|---|---|---|
| 7 | 14 | 4 | 4 |
| 14 | 27 | 4 | 7 |
| 28 | 53 | 4 | 14 |
| 70 | 133 | 4 | 34 |
| 140 | 265 | 4 | 67 |
| 280 | 529 | 4 | 133 |
Frequently asked questions
What formula does this calculator use?
Strips needed = ceil(per ÷ rw); Strips per roll = floor(rl ÷ h); Rolls needed = ceil(ceil(per ÷ rw) ÷ floor(rl ÷ h)). Variables: per = room perimeter in m, h = wall height in m, rw = roll width in m, rl = roll length in m.
What do I need to enter?
You need room perimeter (m), wall height (m), roll width (m), roll length (m). Results update as you type.
What is an example result?
With the default inputs (room perimeter = 14 m, wall height = 2.4 m, roll width = 0.53 m, roll length = 10.05 m), the results are: strips needed 27; strips per roll 4; rolls needed 7.
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