Construction & Materials
Wallpaper Calculator
Wallpaper — wallpaper Calculator divides the wall area by the coverage per roll and applies the waste % you enter. This page runs that same calculation on your numbers, in your browser: no signup, no uploads, nothing stored.
Wallpaper Calculator lets you estimate wallpaper rolls in seconds: enter your wall area, coverage per roll and waste % for the number of rolls, all worked out locally in your browser.
Estimate only — not a professional specification. Paint and wallpaper coverage varies with the surface, the number of coats or the pattern repeat and the product you choose, so confirm coverage rates and buy a little extra.
About this calculator
Wallpaper Calculator divides the wall area by the coverage per roll and applies the waste % you enter. It matters before you buy: a clean volume estimate plus a waste allowance beats a guess every time. Here is the calculation on real numbers: A wall 4 m × 2.4 m is 9.6 m². A standard roll covers ~5 m² usable, so you need 2 rolls (allow for pattern repeat). For your own figures, use the calculator above — same method, your inputs, computed on-device.
How to use
- Enter the total wall area in square feet.
- Enter the coverage of one roll in square feet.
- Set a waste percentage for trimming or repeat.
- Tap Calculate to see the number of rolls.
Why use the Wallpaper Calculator
Instant
Every quantity is worked out on your device the moment you tap Calculate.
Private
The numbers you enter stay in your browser and are never uploaded or saved.
Free
No signup, no paywall, and no ads placed inside your results.
Works offline
Once the page has loaded it keeps working on a weak or dropped connection.
Mobile-first
Laid out for phones and tablets on site just as much as for desktops.
Planning estimates
Results are simplified planning estimates; real material needs vary by product size, waste, layout, local codes, and site conditions, so confirm before you buy or build.
Common uses
Use it for rolls from wall area and coverage
Use it for decorator and client quotes
Use it for a hallway or living-room wall
Use it when budgeting a decorating job
Use it for a feature wall or whole room
Use it when estimating rolls of wallpaper
Technical notes
Wallpaper Calculator divides the wall area by the coverage per roll and applies the waste % you enter.
Includes the waste % you enter; confirm coverage rates and material sizes with your supplier before ordering.
All arithmetic runs in your browser using double-precision floating point, so extreme inputs may show tiny rounding differences.
Worked example
A wall 4 m × 2.4 m is 9.6 m². A standard roll covers ~5 m² usable, so you need 2 rolls (allow for pattern repeat).
FAQ
How are wallpaper rolls estimated?
The wall area is divided by the coverage of one roll, with any waste percentage added, then rounded up.
Does the Wallpaper Calculator keep my entries private?
Yes. The Wallpaper Calculator runs in your browser, so nothing you enter is uploaded or saved.
Should I add extra for a pattern repeat?
Yes. A patterned paper wastes more at each strip, so add a waste percentage to be safe.
What if my rolls list a different coverage?
Enter the exact coverage from the label so the roll count matches your wallpaper.