Wallpaper Table: Rolls needed by Total wall area
Reference table of rolls needed for Wallpaper across a range of total wall area values — exact, engine-computed figures you can read off at a glance.
Wallpaper Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Rolls needed
9
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Wallpaper Calculator
The Wallpaper Calculator works out your rolls needed in an instant. Enter total wall area, coverage per roll and wastage allowance and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the total wall area.
- Enter the coverage per roll.
- Enter the wastage allowance.
- Read off your rolls needed — the calculator updates automatically, with no button to press.
Worked example
For example, with total wall area of 400 sq ft, coverage per roll of 56 sq ft and wastage allowance of 15%, the rolls needed is 9.
| Total wall area | 400 sq ft |
|---|---|
| Coverage per roll | 56 sq ft |
| Wastage allowance | 15% |
| Rolls needed | 9 |
|---|
Results are estimates for educational use, not professional advice.
Key terms explained
- Area
- The amount of two-dimensional space a shape covers, measured in square units.
Frequently asked questions
Divide the wall area by the coverage per roll and add wastage. For 400 sq ft with 56 sq ft rolls and 15% wastage, you need about 9 rolls.
Matching the pattern between strips wastes some paper at the top and bottom of each drop, so 10–20% wastage is sensible, more for large repeats.
It is printed on the roll. A standard roll covers around 50–60 sq ft, but designer and wide rolls vary, so use your roll's figure.
Yes, and from the same batch. Different batches can vary slightly in colour, which shows on a finished wall.
Enter the total wall area. Enter the coverage per roll. Enter the wastage allowance. Read off your rolls needed — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Wallpaper: Formula, Steps & Examples
Learn how to calculate Wallpaper — the formula explained step by step, with worked examples and a free calculator to check your answer.