Question 1

How much wallpaper is in one roll?

Accepted Answer

A standard European wallpaper roll is about 10 meters (33 feet) long and 53 cm (20.5 inches) wide, covering roughly 5 square meters (54 sq ft) per roll. American double rolls typically cover 50-60 sq ft.

Question 2

What is pattern repeat and why does it matter?

Accepted Answer

Pattern repeat is the vertical distance before the wallpaper design repeats itself. A larger repeat means more waste when matching strips, so you need to order extra rolls — typically 10-20% more for big repeats.

Question 3

How much extra wallpaper should I buy?

Accepted Answer

Always buy 10-15% extra to cover mistakes, future repairs and pattern matching. Many pros round up to the next full roll. Keep unopened rolls for returns or future patches.

Question 4

Should I subtract doors and windows?

Accepted Answer

Yes. Subtract the area of doors and windows for a more accurate estimate. A standard interior door is about 21 sq ft and a typical window about 12 sq ft.