Wall Paint Pack Size Comparator
Compare the unit value of wall paint by dividing each pack price by its usable coverage.
How to use Wall Paint 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. Choose a paint unit such as one tin or one litre and use its stated coverage per coat. Coverage depends on the product and surface; preparation, drying time and waste are separate. 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 plan paint for a measured wall area. Choose a paint unit such as one tin or one litre and use its stated coverage per coat. Coverage depends on the product and surface; preparation, drying time and waste are separate.
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. Choose a paint unit such as one tin or one litre and use its stated coverage per coat. Coverage depends on the product and surface; preparation, drying time and waste are separate. 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
Wall Paint 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
Read the selected paint’s coverage and coat instructions. Deduct openings from the measured wall area once, then add any chosen waste allowance separately.
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.