Wallpaper Rolls Formula:
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Definition: This calculator determines the number of wallpaper rolls needed based on total yardage required and the yardage per roll.
Purpose: It helps homeowners, decorators, and contractors accurately estimate wallpaper requirements for projects.
The calculator uses the formula:
Where:
Explanation: The total yardage is divided by the yardage per roll, then rounded up to ensure you have enough material.
Details: Proper calculation prevents shortages during installation and minimizes waste from over-purchasing.
Tips: Enter the total yardage needed and the yardage per roll (default 30 yd/roll). All values must be > 0.
Q1: Why round up the number of rolls?
A: Wallpaper must be purchased in whole rolls, and rounding up ensures you have enough material for the entire project.
Q2: What's a typical yardage per roll?
A: Standard wallpaper rolls typically cover about 30 square yards, but this can vary by product.
Q3: How do I calculate total yardage needed?
A: Measure wall area (height × width) in yards, or use our Wall Area Calculator tool.
Q4: Should I account for pattern repeats?
A: Yes, complex patterns may require additional yardage (add 10-20% to total yardage).
Q5: Does this include waste or mistakes?
A: No, consider adding 10-15% extra to your total yardage for trimming and errors.