Unit Price Calculator
Compare two package sizes on price per unit to see which is genuinely cheaper.
Every figure below is labelled in the currency you pick. Amounts are not converted — enter values in the same currency.
The bigger pack is not always cheaper
Supermarkets rely on the assumption that it is. Shelf labels help, but they switch denominators between products — per 100 g on one, per item on the next — which makes the comparison you need exactly the one you cannot do at a glance. And a cheaper unit price on something perishable stops being cheaper the moment you throw a third of it away.
The formula
Unit price = price ÷ quantity
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Unit Price Calculator
- Fill in each field with your own figures — the defaults are only there as an example.
- The result updates as you type, so there is no button to press.
- Check the breakdown under the main result for the supporting numbers.
- Use the copy button to take the result with you, or share the link to reload the same inputs.
Unit Price Calculator — frequently asked questions
Is this unit price calculator free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
How accurate is the result?
The maths is exact for the formula shown on the page. Accuracy in the real world depends on your inputs and on assumptions the formula cannot see, so treat the output as a well-grounded estimate rather than a quote.
Can I use it on my phone?
Yes. The page is responsive, weighs a few kilobytes and works offline once loaded, so it behaves the same on a phone as on a desktop.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the unit price calculator.
- unit price calculator
- unit cost
- price comparison calculator
- which is cheaper
- cost per gram
- price per unit
About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 23, 2026 · Calculation runs client-side · No data collected · Report an error