Project guide
Wallpaper Rolls for a Feature Wall
The chosen pattern can change the purchase even when the wall stays the same.
Your measurements
Changing units changes the display, not the stored measurement.
Results
Example inputs
Your result will appear here
Enter the measurements and product details, then calculate.
These tools estimate material quantities from dimensions you choose. They do not specify structural depth or load capacity.
Measure the full strip height
Record the wall width and the height each full strip must cover. Enter total top-and-bottom trimming allowance separately. Use the selected wallpaper’s roll width, usable length and match information.
A small opening is not automatically a saving of a complete strip. This model does not optimise cuts around sockets, doors or windows.
Example: one wall, two matching rules
Take an illustrative wall 4 m wide and 2.2 m high, a 0.53 m roll width, a 10.05 m usable roll length and 0.1 m total trim. The wall needs eight strips.
For free matching, each strip is 2.3 m long. Four complete strips fit in a roll, so two rolls cover the eight strips. For straight matching with a user-entered 0.64 m repeat, each strip rounds up to 2.56 m. Only three complete strips fit in a roll, so the purchase becomes three rolls.
State the alignment assumption
The calculation does not add an unentered starting alignment loss before the first strip. Check the usable roll length and any starting allowance needed for the product. It also does not model half-drop matching, alternating A/B rolls or mural panels.
Keep the product details on the list
Save the match type, repeat and roll dimensions with the wall. A result labelled only three rolls is incomplete if the product changes. Recalculate if the roll length or repeat changes, even when the wall measurements do not.
The illustration shows how lengths are counted. It is not a hanging sequence or a guarantee that every remaining piece can be reused.
Frequently asked questions
Why not divide wall area by roll area?
A roll must provide complete strips of the required length and matching pattern. Area alone does not show how many usable strips fit.
Sources and method
- PackLedge quantity methods
Original derivations using geometry, ratios, sums and whole-package rounding. Each calculator explains its assumptions and worked examples.
- Your selected product label or technical sheet
The source for the coverage, mixed yield, density, package capacity, sheet dimensions or wallpaper repeat that you enter.
- WallPops — Wallpaper Pattern Repeats and Matching ↗
Manufacturer explanation of free/random matching, straight matching and pattern-repeat terminology.
- Graham & Brown — How to Measure for Wallpaper ↗
Manufacturer context for measuring walls and checking the selected wallpaper.