Wallpaper Calculator
Fill in the values and the answer updates as you type.
How the Wallpaper Calculator works
Each strip is as long as the wall height plus the pattern repeat. Strips per roll = roll length ÷ strip length (rounded down). Strips needed = total wall width ÷ roll width, minus the strips you will not need above and below openings. Buy one extra roll for mistakes and future repairs.
Inputs and results
The Wallpaper Calculator takes 6 inputs and gives 4 results.
What you enter
- Combined width of all walls (ft) — starts at 44.
- Wall height (ft) — starts at 8.
- Roll width (in) — starts at 20.5.
- Roll length (ft) — starts at 33.
- Pattern repeat (in) — starts at 0.
- Doors and windows (total area) (sq ft) — starts at 30.
What you get
- Rolls needed
- Strips needed
- Strips per roll
- Wall area (sq ft)
Example: Wallpaper Calculator with the starting values
With combined width of all walls 44 ft, wall height 8 ft, roll width 20.5 in, roll length 33 ft and pattern repeat 0 in, the calculator returns:
| Rolls needed | 6 |
|---|---|
| Strips needed | 24 |
| Strips per roll | 4 |
| Wall area (sq ft) | 322 |
Change any value above and the results update straight away.
Wallpaper Calculator FAQ
How do I use the Wallpaper Calculator?
Enter combined width of all walls, wall height, roll width and roll length in the fields, then read rolls needed, strips needed, strips per roll and wall area (sq ft) in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Wallpaper Calculator calculate?
Find how many rolls of wallpaper you need. It returns rolls needed, strips needed, strips per roll and wall area (sq ft) from the 6 values you provide.
What values does the Wallpaper Calculator start with?
It opens with combined width of all walls 44 ft, wall height 8 ft, roll width 20.5 in and roll length 33 ft so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Wallpaper Calculator free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Wallpaper Calculator for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.