Unit-price comparison
Larger is not automatically cheaper. Compare two offers using the same unit price.
Compare unit and base prices
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Enter the price and quantity of the first offer.
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Add the price and quantity of the second offer in the same unit.
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Compare the cost per unit and the saving from the cheaper offer.
If you need a bespoke version
You can keep using this free tool as it is. If you need a bespoke version with your own rules, data or workflows for a website, shop or internal process, I can build it for you – for example with B2B pricing and customer groups, custom fee or discount logic, and WooCommerce extensions.
How this tool calculates
The price is divided by the relevant quantity. Both quantities must be entered in the same unit.
Your inputs and results remain on your device. Reloading the page restores the default values.
Terms used in this calculation
- Unit price
- The price for one item or a defined comparison quantity.
- Comparison unit
- The common quantity to which both prices are converted.
- Reference price
- The price per standardised quantity, such as per kilogram or litre.
Frequently asked questions
Can I mix grams and kilograms directly?
No. Convert both quantities to the same unit first, for example both to grams.
What should I enter as the comparison unit?
A sensible common quantity, for example 100 for the price per 100 grams.