Wallpaper Roll Calculator
Turn individual wall measurements into straight- or half-drop drops, repeat-aware cut lengths and wall-specific whole-roll orders.
Part of the Surfaces & Finishes calculators — see all tools in this category.
Wallpaper roll estimate
Lay out straight- or half-drop-match wallpaper as wall-specific drops, then see the whole-roll quantity without pooling partial drops between walls.
Preparing calculator controls…
| Wall 1 | 8 net drops; 2.5 m cut/drop; 4 drops/roll; order 2 rolls |
|---|---|
| All walls | 8 net drops; 2 whole rolls ordered |
Current result
Order 2 whole wallpaper rolls for 8 net drops.
- Measured need
- 8 net drops
- Cut length per drop
- 2.5 m (first wall)
- Drops per roll
- 4 conservative capacity (first wall)
- Purchased stock
- 2 whole rolls
Net drops cover wall width before stock rounding. Trim is added once to each drop; straight match then rounds each cut to the next full pattern repeat. There is no allowance control in this worksheet. Each wall rounds to whole rolls separately, so ordered rolls can contain unused capacity and cannot be reduced by pooling partial drops across walls. Blank roll prices are incomplete purchase lines, not $0.
- Straight-match policy: each cut drop is rounded up to the next whole pattern repeat after trim is added.
- Each wall is rounded to whole rolls independently; partial drops and usable roll lengths are not pooled between walls.
- Free-match and other policies are not calculated because they need separately documented cutting rules.
| Material | Net need | Order quantity |
|---|---|---|
| User-specified wallpaper roll — Wall 1 | 8 count (ordered) | 8 count (ordered) (2 packs) |
No prices entered
Cost breakdown
No prices entered. This is not a completed zero-cost estimate.
| Line | Purchased quantity / unit / basis | Pricing state | Direct price | Entered line tax |
|---|---|---|---|---|
| Wallpaper rolls | 2 count (ordered) | Not priced | — | — |
- Direct priced subtotal
- $0.00
- Selected contingency base
- $0.00
- Contingency rate
- 0%
- Contingency amount
- $0.00
- Before-tax total
- $0.00
- Entered line tax
- $0.00
- Contingency tax (not entered)
- $0.00
- Final total unavailable — enter a price to begin the estimate
- —
Missing price categories: Wallpaper rolls.
Cost by category
No entered prices to chart.
| Category | Cost | State |
|---|---|---|
| Wallpaper rolls | Not priced | not-priced |
How it works and assumptions
Add every wall separately, enter the selected roll's usable width and length, and state trim, repeat and match policy. The calculator counts drops by wall width, rounds each cut to the selected repeat rule, and then rounds each wall to whole rolls.
For finish-planning context, see the live Surfaces & Finishes Guide and the practical Measure & Order Trim and Wallpaper guide.
Worked example
The calculator's assumptions panel includes a separate 3.1 m × 2.2 m straight-match example, distinct from the UAT fixture, so you can inspect the cut and roll-rounding order.