How Many Rolls of Wallpaper for a Large 20x15 ft Bedroom?
A large 20×15 ft master bedroom with 9-foot ceilings and 15% waste needs approximately 14–16 rolls of standard wallpaper.
How to use this tool
- Enter room length, width, and wall height in feet.
- Check your wallpaper roll dimensions and enter them accurately.
- Add 15% waste for patterned wallpaper, 10% for plain designs.
Calculate the number of wallpaper rolls needed to paper a large 20×15 foot master bedroom including a generous waste allowance.
Frequently asked questions
- How many rolls of wallpaper do I need?
- Divide the total wall area by the coverage per roll, then add 10–15% for waste and pattern matching. Measure wall area as perimeter × height.
- What size is a standard wallpaper roll?
- US double rolls are typically 27 inches wide and 27 feet long, covering about 60 sq ft before waste. European rolls are often 20.5 in × 33 ft.