Home & build · NUMORA
Wallpaper Calculator
Rolls from wall height, roll length and pattern repeat.
Open interactive calculatorHow to use
How many drops per roll, then round up from perimeter.
Formula
drops = floor(roll / (height+repeat)); rolls = ceil(perimeter/width / drops)
FAQ
Is this Wallpaper calculator accurate?
The formula and assumptions are shown on the page, and the engine is covered by audit tests. Results are for reference — not financial or medical advice.
Do I need an account?
No. Calculations run in your browser. Recents can stay on this device.
What inputs do I need?
How many drops per roll, then round up from perimeter.
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