Decorating & Walls calculator
Wallpaper Calculator
Calculate wallpaper drops and whole rolls from total wall width, drop height, roll dimensions and pattern repeat.
Calculate wallpaper drops and whole rolls from total wall width, drop height, roll dimensions and pattern repeat. Keep the dimensions and units consistent, then check the figures that describe the product or layout you will really use. In this calculation, pattern repeat and usable drop length can change the answer materially. Pattern matching can reduce the number of full drops obtained from each roll. Keep rolls from the same batch where colour consistency matters.
What you need to enter
The Wallpaper Calculator uses the following project information to calculate the result.
- Total wall width
- Wall height
- Roll width
- Roll length
- Pattern repeat
Calculator result
Drops required and whole rolls to buy
How the Wallpaper Calculator works
To produce drops required and whole rolls to buy, the Wallpaper Calculator applies calculates drops per roll with pattern-repeat allowance. The engine is configured for wallpaper rolls for a room or set of walls, including pattern repeat, not as a generic text estimate. Check pattern repeat and usable drop length, since an incorrect value there can materially change the result.
Wallpaper Calculator worked example
Wallpaper Calculator example: a room has 13.2 m of total wall width, 2.45 m drops and 0.53 m × 10 m rolls with a 0.32 m repeat. The repeat rounds each drop up to a full pattern module before the tool works out drops per roll and the whole-roll order. The worked figure becomes more useful when pattern repeat and usable drop length is taken from the real product or site rather than a generic default.
Important calculation assumptions
For wallpaper rolls for a room or set of walls, including pattern repeat, pattern matching can reduce the number of full drops obtained from each roll. Keep rolls from the same batch where colour consistency matters.
Frequently asked questions
What are the essential inputs for the Wallpaper Calculator?
The quality of the result starts with the inputs. Measure total wall width and full drop height, then use the exact roll width, roll length and pattern repeat from the wallpaper label. They are used here to estimate wallpaper rolls for a room or set of walls, including pattern repeat.
Why should I check pattern repeat and usable drop length in the Wallpaper Calculator?
Before relying on the Wallpaper Calculator, check pattern repeat and usable drop length. Pattern matching can reduce the number of full drops obtained from each roll. Keep rolls from the same batch where colour consistency matters.
How should I turn the Wallpaper Calculator result into an order quantity?
For the Wallpaper Calculator, the numerical answer still needs a real-world check. Round up to whole rolls and try to buy them from the same batch. Pattern matching, damaged drops and future repairs are good reasons not to order the theoretical minimum.