Wallpaper Pack Size Comparator
Compare the unit value of wallpaper by dividing each pack price by its usable coverage.
How to use Wallpaper Pack Size Comparator
1. Enter Pack A Price, Pack A Coverage, Pack B Price, Pack B Coverage. Use the matching measurement or purchase unit. 2. Both coverages must be positive and use one area and finish basis. Equal exact rates are reported as equal value. The comparison does not calculate whole-project pack counts. This is an area estimate using usable coverage per roll. It does not calculate full-height drops, pattern matching or roll cutting. 3. Select Calculate or press Enter to see better-value pack. 4. Select Select Copy result to copy the answer, or Reset to clear the form.
Why use this tool?
Use this calculator to compare wallpaper coverage for a measured wall area. This is an area estimate using usable coverage per roll. It does not calculate full-height drops, pattern matching or roll cutting.
How the calculation works
Pack A unit price = A price ÷ A coverage; Pack B unit price = B price ÷ B coverage. Compare the unrounded rates. Both coverages must be positive and use one area and finish basis. Equal exact rates are reported as equal value. The comparison does not calculate whole-project pack counts. This is an area estimate using usable coverage per roll. It does not calculate full-height drops, pattern matching or roll cutting. Counts and comparisons use exact entered decimals. Other dimensions display up to six decimal places, with scientific notation for smaller nonzero results. Input and result magnitudes are limited to 9,007,199,254,740,991. Currency uses the selected currency’s minor unit.
Example
Wallpaper example: Example Pack A costs £25 for 5 m² (£5/m²); Pack B costs £36 for 6 m² (£6/m²). Pack A has the lower unit price.
Practical tip
Use coverage that already accounts for the chosen paper’s usable yield. Check a roll layout for wall height, pattern repeat and trimming before ordering.
Frequently asked questions
What does this result include?
Both coverages must be positive and use one area and finish basis. Equal exact rates are reported as equal value. The comparison does not calculate whole-project pack counts.
Are these current supplier prices?
The prices in the example are assumed arithmetic values. Enter the current price and matching quantity or coverage from the supplier you intend to use.
How should I interpret rounding and units?
Whole purchase counts round up and maximum fit counts round down using the entered decimals exactly. Other dimensions use up to six decimal places; smaller nonzero results use scientific notation. Currency rounds to its minor unit, with smaller positive costs labelled explicitly. Unit selectors describe the input unit; changing one does not convert entered values.