How to use the Unit price comparison calculator
Enter pack a price, pack a units, pack b price, and pack b units. Choose the currency for your inputs and read the result as you change the values.
How it works and formula
Unit price = pack price ÷ quantity. The lower unit price identifies the cheaper pack per unit.
Worked example
| Pack A price | 12 |
|---|---|
| Pack A units | 8 |
| Pack B price | 15 |
| Pack B units | 12 |
Result
Per unit — A $1.50 · B $1.25
Pack B costs less per unit
Choosing your inputs
Use the same unit for both packs. For two detergent bottles, enter both quantities in millilitres or both in litres. For a multipack, count the contents that you will actually use.
How to interpret the result
An eight-unit pack at $12 costs $1.50 per unit. A twelve-unit pack at $15 costs $1.25 per unit. If the two rounded figures look equal, the winner below them is based on the unrounded calculation.
Frequently asked questions
Can I compare weight instead of counts?
Yes. Enter both quantities in the same unit, such as grams for both packages.
When do the two packs cost the same per unit?
Multiply Pack A’s unit price by the number of units in Pack B. With an A price of $1.50 per unit and 12 units in B, they match at $18.