Wallpaper Cost Calculator
Calculate the number of wallpaper rolls needed (rounded up for pattern repeat waste), material cost, and optional installation labor from wall dimensions or area.
Wall Area & Roll Coverage Inputs
5 Rolls Required (4.44 exact rolls rounded up)
Wallpaper Rolls & Total Cost Formula
Rolls Required = CEIL[ (Wall Area ร (1 + Waste %)) รท Roll Usable Coverage ]- Adjusted Wall Area = Wall Width ร Wall Height ร (1 + Waste Percentage รท 100).
- Estimated Rolls Required = Adjusted Wall Area รท Roll Coverage (rounded up to the next whole roll).
- Total Estimate = (Estimated Rolls ร Price per Roll) + Installation Cost.
Step-by-Step Worked Example
Calculation Steps:
- Adjusted Area with 15% Waste = 216 ร 1.15 = 248.4 sq ft
- Exact Rolls = 248.4 รท 56 = 4.44 rolls โ Rounded up to 5 rolls
- Material Cost = 5 ร $65.00 = $325.00; Total with Install = $325.00 + $250.00 = $575.00
How to Use This Calculator
- 1Select whether to enter Wall Width & Height or Direct Wall Area in square feet.
- 2Enter the coverage per roll (check whether your wallpaper is sold in ~28 sq ft single rolls or ~56 sq ft double rolls).
- 3Enter price per roll, pattern repeat waste percentage (typically 10%โ20%), and optional installation cost.
Assumptions & Limitations
- Rounds roll count up to the nearest integer roll.
- Large vertical pattern repeats (18โ24 inches) require a higher waste percentage (15%โ20%) than non-matched textured wallpaper (10%).
Frequently Asked Questions
What is the difference between a single roll and a double roll of wallpaper?
Wallpaper is often priced by the single roll (~28 sq ft) but packaged and shipped as continuous double rolls (~56 sq ft) so installers can cut 3 full 8-to-9-foot vertical drops per roll.
Why does pattern repeat increase the number of rolls needed?
Drop-match and large straight-match patterns require trimming several inches off the top of each adjacent strip so the motif aligns horizontally across seams.
Should I order an extra roll from the same dye lot?
Rounding up to the next full roll ensures all strips come from the same production dye lot (batch number) and provides spare material for future repairs.
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