Wallpaper Paste Calculator
Enter your roll count, product coverage, spare percentage, bucket price and currency label.
A QUICK WALKTHROUGH
How to use this tool
- Enter a whole roll count and coverage per bucket.
- Enter spare allowance, price and currency label.
- Calculate and copy the arithmetic estimate.
Calculation
Required coverage = rolls × (1 + spare / 100). Buckets round up the coverage ratio; cost = buckets × price. Remaining coverage = buckets × coverage − required coverage.
Scope and precision
Coverage is supplied by you. This tool does not select paste, recommend coverage or calculate dilution. Decimal inputs determine the exact bucket count; other displayed numbers use approximate JavaScript arithmetic. Processing stays in your browser.
GOOD TO KNOW
Common questions
Why round buckets up?
A fractional bucket is counted as a whole purchase. Coverage and allowance are your assumptions.