One batch number
Different batches can differ by a shade that shows on the wall. Buy every roll from the same batch.
Roll Calculator
Wallpaper calculator: how many rolls do I need — and what will it cost?
Enter the room or wall size and the height — drops, rolls and cost appear instantly, pattern repeat included. Our 15 m² rolls are SAR 280 (Chinese), 340 (Korean) or 400 (Vietnamese), supplied and installed; standard 53 cm rolls work too.
The Method
How to calculate wallpaper rolls
Example: a 5 × 4 m room with 3 m walls → 18 m of wall → 34 drops from 53 cm rolls → each 10 m roll gives 3 drops of 3.10 m → 12 rolls.
- Width
Add up the wall widths
For a whole room: (length + width) × 2. For one wall: just its width.
- Drops
Count the drops
Total width ÷ roll width, rounded up.
- Drop length
Work out each drop’s length
Wall height + 10 cm for trimming; with a pattern, round up to a whole number of repeats.
- Per roll
Drops per roll
Roll length ÷ drop length, rounded down — the rest goes to trimming or above doors.
- Rolls
Rolls
Drops ÷ drops per roll, rounded up — plus one spare roll from the same batch.
Worked examples
Rolls and cost for common rooms (3 m walls)
All four walls, small doors and windows not deducted; prices include supply and installation for plain or small-pattern paper — a large repeat (53 cm) may need one more roll, as shown in brackets.
| Room | Our 15 m² rolls | Chinese | Korean | Vietnamese |
|---|---|---|---|---|
| Room 3 × 3 m | 3 rolls | SAR 840 | SAR 1,020 | SAR 1,200 |
| Room 4 × 3 m | 3 rolls (4 rolls with a large repeat) | SAR 840 | SAR 1,020 | SAR 1,200 |
| Room 4 × 4 m | 4 rolls | SAR 1,120 | SAR 1,360 | SAR 1,600 |
| Room 5 × 4 m | 4 rolls (5 rolls with a large repeat) | SAR 1,120 | SAR 1,360 | SAR 1,600 |
| Room 5 × 5 m | 4 rolls (5 rolls with a large repeat) | SAR 1,120 | SAR 1,360 | SAR 1,600 |
| Room 6 × 5 m | 5 rolls (6 rolls with a large repeat) | SAR 1,400 | SAR 1,700 | SAR 2,000 |
Roll sizes
Common wallpaper roll sizes
The roll size and pattern repeat are printed on the roll label — we confirm both before ordering.
| Roll | Width × length | Coverage | Note |
|---|---|---|---|
| Our rolls | About 15 m² | Covers a 5 × 3 m wall | Chinese SAR 280 · Korean 340 · Vietnamese 400, supplied and installed |
| Standard roll | 53 cm × 10 m | About 5.3 m² | The most common size for European papers |
| Wide roll | 106 cm × 15.6 m | About 16.5 m² | Fewer seams, faster hanging |
| Other sizes | e.g. 70 cm × 10 m | Varies | Choose “Other size” in the calculator |
Before you buy
Mistakes that cost extra rolls — or a two-tone wall
A spare for repairs
If you want to keep paper for future repairs, make it from the same batch.
Doors and windows
Do not deduct normal openings — the pieces above and below them still need paper.
Half-drop patterns
They waste more than straight matches. Choose “large repeat” or type the repeat into the calculator.
Questions
Frequently asked questions
How many rolls for a 4 × 4 m room, and what does it cost?
With 3 m walls (all four walls): about 4 rolls of our 15 m² rolls — SAR 1,120 Chinese, 1,360 Korean or 1,600 Vietnamese, supplied and installed. With standard 53 cm × 10 m rolls you need about 11 rolls.
How much is a roll of wallpaper?
Our rolls are about 15 m² and cover a 5 × 3 m wall: SAR 280 Chinese, SAR 340 Korean and SAR 400 Vietnamese — supply and installation included. Prices and examples.
How many square metres does a roll of wallpaper cover?
Our rolls cover about 15 m² — a 5 × 3 m wall. A standard 53 cm × 10 m roll covers about 5.3 m² on paper, less in practice after trimming and pattern matching.
Should I deduct doors and windows?
Not normal ones — the pieces above and below them still need paper, and the difference covers trimming waste. Only very large openings such as glass walls are deducted.
What is a pattern repeat?
The vertical distance after which the pattern repeats, printed on the roll label (for example 53 cm). The larger the repeat, the more waste, because every drop must start at the same point of the pattern.
Are wide rolls better value?
They are usually quicker to hang with fewer seams, but compare the price per square metre and the waste — we work it out for you in the quote.
Begin your project
Done the maths? Send it over
We confirm the quantity at a free site visit and send catalogue photos — prices include supply and installation.