About Wallpaper Calculator
Wallpaper Calculator estimates room wall area, wallpaper strip requirements, and a recommended number of rolls.
Inputs are processed locally in your browser and are not sent to Navorika.
How the calculation works
Wall area
Gross wall area = room perimeter × wall height.
Net area
Net wall area = gross wall area - entered doors and windows area.
Strip method
Required strips are estimated from room perimeter ÷ roll width, while strips per roll are calculated from roll length ÷ wall height.
How to use this calculator
- 1Choose metres or feet.
- 2Enter room length, width, and wall height.
- 3Enter wallpaper roll width and length.
- 4Enter approximate door/window area and waste allowance.
- 5Review recommended roll quantity.
Understanding the result
The calculator checks both area coverage and the number of full-height strips available from each roll.
The larger roll requirement is used as the recommendation.
Important limitations
- Pattern repeats, matching, trimming, damaged sections, irregular walls, alcoves, and complex openings may increase material usage.
- Measure actual wallpaper roll dimensions rather than assuming all products use the same size.
Frequently asked questions
How many wallpaper rolls do I need?
Enter your room and roll measurements; the calculator estimates both wall area and full-height strip requirements.
Should I include waste?
Yes. A waste allowance helps account for trimming, errors, and pattern matching.
Should doors and windows be deducted?
They can be entered as an approximate combined area.