CALCU calcu.cc

Wallpaper Calculator

Estimate how many wallpaper rolls you need for a room. Enter room and roll dimensions, pattern repeat, and waste percentage.

Set to 0 if the wallpaper has no pattern repeat.

Enter room and roll dimensions to estimate the number of wallpaper rolls needed.

Wallpaper Calculator

Planning a wallpaper project requires knowing how many rolls to buy. This calculator uses your room dimensions, wallpaper roll size, and pattern repeat to estimate the number of rolls needed, including a waste allowance for cuts and matching.

The formula calculates the room perimeter, determines how many drops (vertical strips) are needed based on the roll width, and how many drops fit on each roll considering the ceiling height and pattern repeat. A waste percentage accounts for trimming and pattern alignment.

How it works

Rolls = ⌈Total Drops ÷ Drops per Roll⌉ × (1 + Waste%). Total Drops = ⌈Perimeter ÷ Roll Width⌉. Drops per Roll = ⌊Roll Length ÷ Effective Drop Height⌋. Effective Drop Height accounts for pattern repeat alignment.

Use cases

  • Estimating wallpaper rolls for a room renovation
  • Budgeting material costs for interior decoration
  • Comparing different roll sizes and pattern repeats
  • Planning purchases to avoid shortages or excess

Related Calculators

Paint Calculator

Calculate how much paint you need for a room. Enter dimensions, doors, and windows to get the exact amount of paint and number of cans required.

Try Now

Tile / Flooring Calculator

Calculate how many tiles you need for a floor or wall. Enter area and tile dimensions to get the exact quantity including waste.

Try Now

Concrete Calculator

Calculate how much concrete you need for slabs, circular foundations, or columns. Get volume, cement bags, sand, and gravel quantities for different mix ratios.

Try Now