How this calculator works
Estimate full-height wallpaper strips and round up to complete rolls. Pattern matching and trimming can materially increase waste, so the calculator keeps those assumptions visible.
Required strips = wall perimeter ÷ roll width. Usable strips per roll are based on wall height adjusted for pattern repeat; rolls are rounded up.
Example
A 44 ft perimeter room with 8 ft walls typically requires several double rolls depending on roll dimensions and pattern repeat.
How to get a better estimate
- Confirm whether the retailer sells single or double rolls.
- Large pattern repeats can reduce usable strips per roll.
- Buy rolls from the same dye lot for consistent color.
What the result means
The result is a planning estimate. Dimensions, coverage, density, packaging and installation conditions vary by product and project. For purchasing, compare the result with the exact product label or supplier specification. For structural, electrical, code-regulated or safety-critical work, use an appropriately qualified professional.
Common questions about the Wallpaper Calculator
What does this calculator estimate?
Estimate full-height wallpaper strips and round up to complete rolls. Pattern matching and trimming can materially increase waste, so the calculator keeps those assumptions visible.
What formula does it use?
Required strips = wall perimeter ÷ roll width. Usable strips per roll are based on wall height adjusted for pattern repeat; rolls are rounded up.
How should I use the result?
Use it as a planning estimate, then verify the dimensions and replace editable defaults with the specifications for the product or service you actually intend to buy.
Reference tables
Want a fast benchmark without changing inputs? These static tables use the same published calculation method.