Use this free unit price calculator to compare two package sizes by price per ounce, pound, count, sheet, roll, or any shared unit.
Small cereal vs Family cereal
Unit price is only fair when both quantities use the same unit and the products are actually comparable.
Compare small and family-size grocery packages.
Check whether bulk paper towels, pet food, or detergent are actually cheaper.
Convert sale prices into a fair per-unit comparison.
Teach price-per-unit shopping math in plain language.
Cheaper price per oz
Cheaper per roll
Cheaper per lb
Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.
Use it when your task matches one of these common needs: Compare small and family-size grocery packages. Check whether bulk paper towels, pet food, or detergent are actually cheaper. It works best when you already know the values, dates, units, or settings the page asks for.
In plain language: The calculator divides each item price by its package quantity, compares both unit prices, and shows the cheaper option. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
Price: The shelf or sale price for each product. Quantity: Package size for each product in the same unit. Shared unit: The unit both products use, such as oz, lb, count, roll, or sheet.
Read the main answer first, then check the supporting lines and examples to understand how the calculator got there. If one input changes, rerun the tool and compare the new answer instead of guessing.
A lower unit price is not always the best choice if quality, expiration date, storage space, coupons, or product differences matter. Also check that you used the right unit, date, scale, or mode because small input changes can change the result.
Convert them to the same unit first. For example, change pounds to ounces or ounces to pounds, then enter both quantities using that one shared unit.
A bigger package can cost more per unit, expire before you use it, or be different quality. Unit price tells you the math, but it does not judge whether the product is actually better for you.
No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.