The formula, made clear.
Unit price = product price ÷ quantity. The lower unit price represents better value when the products are otherwise comparable.
← All calculatorsHOW IT WORKS PRACTICAL GUIDE WORKED EXAMPLE COMMON QUESTIONS
SHOPPING TOOL
Unit Price Comparator
Compare two different prices and pack sizes to identify the lower cost per unit.
Best valueProduct B is better valueA: 0.024 per unit · B: 0.02 per unit · difference 16.67%
When to use this calculator
Compare groceries, household products or other packs when the sizes and prices differ.
See the calculation in context
A 500 g pack costing 12 has a unit cost of 0.024 per gram, while a 1,000 g pack costing 20 costs 0.020 per gram, making the larger pack better value.
Frequently asked questions
Do both quantities need the same unit?
Yes. Enter both quantities in the same unit, such as grams, millilitres or pieces.
Is the lowest unit price always best?
Not necessarily. Quality, expiry, storage space and how much you will actually use also matter.