Estimate wallpaper rolls, full-height strips, pattern-repeat allowance, waste and material cost.
WALLPAPER PLANNING GUIDE
A good wallpaper estimate starts with the wall area, subtracts openings, converts the remaining area into full-height drops, and then accounts for roll length, pattern repeat, waste and spare rolls.
Enter the width and height of one wall and the number of identical walls. Measure carefully before ordering, especially when several walls have different sizes.
Use the deduction field for openings that will not be wallpapered. The remaining net area is what the calculator uses when estimating full-height strips.
Trimming allowance increases the cut length of each drop. When a pattern repeat is entered, the calculator rounds the drop length upward so the pattern can align.
Roll length and the adjusted drop length determine how many complete drops can be cut from one roll. Longer pattern repeats can reduce this quantity.
The calculator first determines the base roll quantity, then applies the selected waste percentage and finally adds any spare rolls requested for repairs or matching.
Enter the price per roll to estimate the wallpaper purchase cost. Check that all rolls are the correct size, pattern and production batch before ordering.
Actual roll requirements can vary with wall shape, pattern matching, trimming, damaged material, installation method and manufacturer specifications. Large pattern repeats may require more material than plain wallpaper.
Confirm roll width, roll length and pattern repeat from the product label before buying. Rolls from the same production batch are preferable where colour consistency matters. Adhesive, lining paper, labour, delivery and surface preparation are not included in the estimated cost.