Wallpaper Calculator
Overview
Calculate wallpaper rolls needed for any room. Account for doors, windows, pattern repeats, and waste factors. Get accurate estimates for your wallpapering project.
Key Facts
| Field | Value |
|---|---|
| Calculator ID | wallpaper |
| Category | Lifestyle |
| Vertical | Lifestyle & Home |
| App route | /verticals/lifestyle/wallpaper |
| API endpoint | /api/public/calculate?id=wallpaper |
Inputs
| Input ID | Label | Type | Required | Default | Constraints |
|---|---|---|---|---|---|
roomLength | Room Length (feet) | number | Yes | 12 | min 1, max 100, step 1 |
roomWidth | Room Width (feet) | number | Yes | 10 | min 1, max 100, step 1 |
ceilingHeight | Ceiling Height (feet) | number | Yes | 8 | min 6, max 20, step 1 |
rollWidth | Wallpaper Roll Width (inches) | number | Yes | 21 | min 18, max 36, step 1 |
rollLength | Wallpaper Roll Length (feet) | number | Yes | 33 | min 10, max 50, step 1 |
patternRepeat | Pattern Repeat (inches) | number | Yes | 0 | min 0, max 36, step 1 |
doors | Number of Doors | number | Yes | 1 | min 0, max 10, step 1 |
windows | Number of Windows | number | Yes | 2 | min 0, max 20, step 1 |
How to Use
- Enter Room Dimensions — Input room length, width, and ceiling height
- Add Pattern Repeat — Enter pattern repeat distance if applicable
- Count Doors & Windows — Subtract openings for accurate calculation
Result Surfaces
| Output | Display Type | Format |
|---|---|---|
| Computed results | result-card | - |
Related Calculators
FAQ
How do I calculate how much wallpaper I need?
Calculate wall area (perimeter × height), subtract doors/windows, divide by roll coverage (typically 27.5 sq ft per single roll), and add 15% waste factor. For pattern repeats, add extra waste. Always buy in pairs (double rolls) for color consistency.
How many sq ft does a roll of wallpaper cover?
A standard single roll is 21 inches wide × 33 feet long = 57.75 sq ft. After trimming waste, actual coverage is ~27.5 sq ft. A double roll (same width, double length at 21" × 66') covers ~55 sq ft. European rolls (27" wide) cover more per roll.
What is pattern repeat and why does it matter?
Pattern repeat is the vertical distance before the design repeats. Small repeats (6-12 inches) add 5-10% waste. Large repeats (24+ inches) add 15-25% waste because you must match patterns across strips, wasting more at ceiling/floor cuts.
Evidence
src/lib/calculators/registry.ts(metadata)src/lib/calculators/page-registry.ts(page/HowTo metadata)src/lib/calculators/lifestyle/wallpaper.ts(calculator config)