Wallpaper calculator
Wall 1
Height
Width
Area 1
Height
Width
Doors
Double Doors
Frequently Asked Questions
- How do I calculate how much wallpaper I need?
Measure the total wall area and divide by the wallpaper roll coverage to get a basic number of rolls. Measure each wall height and width, subtract doors and large windows, then use the roll length and width to calculate how many full-height drops you can get per roll, allowing for pattern repeat and trimming. Round up and add 10 to 15% extra for matching, waste and mistakes, or follow the pattern match advice on the product page for a more precise figure.
- How much will a 10m roll of wallpaper cover?
A 10 m roll will typically cover about 5.2 m² when the roll width is 52 cm, though exact coverage depends on roll width, room height and pattern repeat. Divide 10 m by your wall height to find how many full drops you get, then multiply drops by the roll width for linear metres of wall covered. For example, at 2.4 m high you would get four drops, covering about 2.08 m of wall. Allow extra for pattern matching and waste.
- How many rolls of wallpaper do I need for my room?
You need to calculate the number of rolls from your room dimensions, roll width and length, and the paper’s pattern repeat. Measure wall perimeter and wall height, subtract doors and large windows, then divide perimeter by roll width to get required drops. Divide roll length by drop length (wall height plus allowance for matching and trimming) to find drops per roll, then divide total drops by drops per roll and round up. Allow an extra 5–10% for matching and mistakes, and check the manufacturer’s coverage guidance.
- How to calculate wall size for wallpaper?
Measure the wall width and height and multiply them to get the wall area in square metres. For rooms with doors or windows, subtract their area from the total. Check the wallpaper roll coverage on the label, then divide your net wall area by the roll area to estimate how many rolls you need. Account for pattern repeat and match by adding extra waste, typically 10 to 15 percent, or more for large repeats, to ensure enough paper for matching and trimming.