Understanding Wallpaper Calculations
Calculating the number of wallpaper rolls needed ensures you purchase the right amount, avoiding waste or shortages. This calculator considers wall dimensions, roll specifications, and pattern repeat for accurate results.
Pattern repeat is critical for designs that need to align across strips. A larger repeat may require more wallpaper to match patterns properly.
Wallpaper Roll Coverage Comparison
| Roll Size | Coverage (sq ft) | Typical Use |
|---|---|---|
| Standard (27 in x 27 ft) | 60.75 | Small to medium rooms |
| Double (27 in x 54 ft) | 121.5 | Large rooms or feature walls |
| European (21 in x 33 ft) | 57.75 | Small rooms or accents |
How to Use the Wallpaper Calculator
- Measure the width of each wall and sum them for total wall width.
- Measure the height of the walls (use the tallest point if uneven).
- Enter the roll width and length as specified by the manufacturer.
- Input the pattern repeat (if any) from the wallpaper specifications.
- Click "Calculate Rolls" to see the number of rolls needed.
Wallpaper Coverage Chart
Coverage area for different roll sizes (assuming 8 ft wall height).
Frequently Asked Questions
What if my walls have doors or windows?
Subtract the area of doors and windows from the total wall area before calculating. This calculator assumes solid walls; adjust manually for openings.
Do I need extra wallpaper for mistakes?
Yes, it’s recommended to purchase 10-15% extra to account for errors, trimming, or future repairs.