Wallpaper Roll Calculation & Roll Calculator

Use our roll calculator to easily determine the number of wallpaper rolls you need. Simply enter the dimensions or the area of your wall. You can also specify the size of the wallpaper roll and any pattern repeat.

cm (only for patterned wallpaper)

a = Room height

b = Room perimeter

a x b = Total area

Knowing how many rolls of wallpaper you need is essential for any successful wallpapering project. Accurate measurement of all surfaces to be covered is crucial. If you miscalculate or order too little, you may need to buy more rolls later—risking that your original batch number is no longer available.

You can easily calculate the required number of rolls using our wallpaper roll calculator, available at the top of every product detail page. Simply measure the width and height of each wall you plan to wallpaper, add those areas together, and include about 5 cm (2 inches) extra to the room height for trimming and pattern matching. We recommend ordering 1–2 extra rolls beyond your calculation. This allows for cutting or installation errors and ensures you have matching rolls for future repairs.

With 1–2 extra rolls from the same batch, you’re on the safe side
Standard Euro wallpaper roll

How to Calculate Wallpaper Rolls Yourself

If you prefer to calculate your wallpaper needs manually, start by measuring the room height and the total perimeter (the combined length of all walls). Subtract the width of doors, but for windows, only subtract the glass area—not the window recess, which must be included.

Step-by-step calculation:

  1.  Divide the total wall length (perimeter) by the width of a wallpaper roll. Most wallpaper rolls are standard Euro rolls, 0.53 meters wide.
  2. This gives you the number of wallpaper strips needed.
  3. Multiply the number of strips by the room height to get the total length of wallpaper required.
  4. Divide this number by the length of a wallpaper roll (usually 10 meters) to find out how many rolls you need.

Example:

Room perimeter: 16 m
Room height: 2.50 m
Roll width: 0.53 m
Roll length: 10 m

((16 ÷ 0.53) × 2.50) ÷ 10
(30.19 × 2.50) ÷ 10
75.48 ÷ 10 = 7.5 rolls

 

Always round up to the next whole number and add 1–2 spare rolls for safety.

Measuring the height and width of the wall

Calculating by Square Meters

A simpler, but still reliable, method is to calculate using square meters:

  1. Multiply the room perimeter by the wall height to get the total wall area.
  2. Divide this area by 5, since one standard roll covers about 5 square meters.
  3. Round up and add a 10% margin for waste and pattern matching.

Example:

16 m × 2.50 m = 40 m²
40 ÷ 5 = 8 rolls

 

This rule of thumb works well for plain or small-patterned wallpapers, where there’s minimal waste. For these, just add 10% to your result and round up.

For large-patterned wallpapers that require precise pattern matching, expect more waste—sometimes up to a full strip per roll. Accurate measurement is especially important here. For complicated rooms with lots of corners or for expensive, high-end wallpapers, it’s best to consult a professional to ensure nothing goes wrong with your calculations.

 

The square meter method is especially reliable for plain wallpapers

Additional Tips

  • Always order extra rolls with the same batch number as your main order to ensure perfect color matching for repairs or mistakes.
  • Double-check all measurements before ordering.
  • For non-standard rolls or special wallpapers (like photo murals), consult the manufacturer or a professional for guidance.