Wallpaper Calculator - Rolls Needed for Any Room
Calculate wallpaper rolls needed for any room size.
Tool Interface
Wallpaper Calculator
Find how many wallpaper rolls you need for any room size.
How to use
Enter the room dimensions, number of doors and windows, and your roll size (check the label). Add the pattern repeat in inches if the design needs matching. Press Calculate to see the rolls needed. Reset restores the example values.
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About This Tool
Frequently Asked Questions (FAQ)
How many wallpaper rolls do I need?
Enter your room length, width and wall height plus doors and windows. The calculator subtracts openings and converts the wall area into rolls.
What is pattern repeat?
Pattern repeat is the vertical distance before the design repeats. Larger repeats waste more paper at seams — enter the repeat from your roll label, or 0 for plain wallpaper.
Why enter doors and windows?
Openings reduce the wall area you need to cover. Accounting for them avoids buying rolls you will never hang.
Should I buy extra?
Yes. Buy one extra roll beyond the estimate for mistakes and future repairs — dye lots change between batches.
Is the wallpaper calculator free?
Yes. It is free to use with no signup and no limits.