Sanderson’s rolls and a long half drop
The wallpaper calculator opens here on Sanderson’s standard 52 cm, 10.05 m roll with King’s Rose, whose 103.8 cm repeat is a half drop, and paste in Sanderson’s 5 kg ready-mixed tubs. Replace them with the usable width, vertical repeat and match of your own design, all listed in its product details.
Long half drops are where counting strips pays. On 2.4 m walls with 10 cm of trim, every King’s Rose cut must stop half a repeat beyond a whole one, at 2.6 m, and each roll gives three. Raise the walls to 2.6 m and the next valid cut is 3.63 m, two to a roll, so that bedroom rises from 10 rolls to 14, and from 2 tubs of paste to 3. Try other heights and follow the lengths-per-roll figure in the working.
Wide widths
Sanderson’s wide papers cover the same wall with fewer lengths. Delphiniums & Lilac is 68.6 cm across with a 95.1 cm straight repeat, and in the table the same room takes 22 lengths instead of 29, or 8 rolls. Pick Wide width in the roll menu for any of these. For paste, Sanderson counts four wide rolls to a tub against five standard ones, and the calculator switches rate when the roll is 60 cm or wider.
Sanderson papers in the calculator
A 4 × 3.5 m room with 2.4 m walls, one 762 × 1981 mm door and one 1.2 × 1.2 m window, 10 cm trim a drop, each paper on its own roll. The first one is what the calculator above starts with.
| Paper | Roll | Drop | Drops a roll | Rolls | Area method |
|---|---|---|---|---|---|
| King's RoseVertical Pattern Repeat 103.8 cm, Half Drop Match | 52 cm × 10.05 m | 2.59 m | 3 | 10 | 7 |
| Delphiniums & Lilac (wide width)Usable Width 68.6 cm, Vertical Pattern Repeat 95.1 cm, Straight Match | 68.6 cm × 10.05 m | 2.85 m | 3 | 8 | 5 |
Roll sizes, repeats and matches as Sanderson states them on the pages linked above, checked September 2026. Sanderson and its product names are its owner's trademarks, used only to describe the products; Meadow Tools is not affiliated with or endorsed by Sanderson.