Calculatium

Wallpaper Roll Calculator

Estimate wallpaper rolls from wall length, height, roll size, pattern repeat and trimming allowance. Counts complete strips without deducting openings.

Enter your values

The starting values are editable examples. Results update when you change your inputs.

Example: 10
Example: 2.5
Example: 0.5
Example: 10
Example: 0
Example: 0

Your result

Updates as you change your values.

Enter values to calculate.

How it is calculated

Strips = ceiling(perimeter / roll width). Adjust strip length for trimming and vertical repeat. Strips per roll = floor(roll length / strip length). Rolls = ceiling(strips / strips per roll).

Worked example

A 10 m perimeter and 2.5 m wall height need twenty 0.5 m-wide strips. A 10 m roll provides four strips without trimming or repeat allowance, so five rolls are needed.

Before you calculate

Enter the full wall length to cover and a consistent cutting height. If you allow trimming at both ends, enter the sum once. Use the wallpaper's actual vertical repeat. Check any drop-match instructions separately rather than assuming a straight match.

Interpreting the result

The estimate uses complete strips and does not join short offcuts. Doors and windows are not automatically deducted because their offcuts may be unusable. Damaged paper, matching, wall irregularity and batch availability may justify extra material.

Use the units shown beside each field. Monetary fields labelled EUR stay in euros; changing language does not exchange currencies. Results are estimates under the stated assumptions.