Unit Price Calculator
Compare two products by price per unit to find the better deal.
The bigger package isn't always the better deal, and "buy one get one" can lose to a plain larger size. The only honest comparison is price per unit — per gram, per millilitre, per sheet, per item — which strips away package size and promotions to reveal what you're actually paying for the stuff inside.
Enter the price and quantity of two options and this calculator shows the unit price of each and which is cheaper, with the percentage you'd save. It's the quick math to do in a supermarket aisle when two products are priced to make comparison deliberately hard.
How to use Unit Price Calculator
- 1
Enter option A
Its price and quantity (any consistent unit).
- 2
Enter option B
Its price and quantity in the same unit.
- 3
See the winner
The lower unit price and how much you save.
Features
- Price-per-unit for both options
- Highlights the cheaper choice
- Shows the percentage saving
Frequently asked questions
Common mistakes to avoid
- Comparing options measured in different units without converting first.
- Ignoring waste — the lowest unit price isn't a saving if the product expires unused.
Get new tools in your inbox
One email a month with new tools, guides, and updates. No spam, unsubscribe anytime.