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.
Recent unit price comparisons will appear here.
Unit price comparisons stay local. Check sale tags, taxes, membership prices, and package size labels before buying.
Inputs and recent answers stay in this browser tab and are not sent to a server.
Compare price per ounce for small and family-size grocery packages.
Check whether bulk paper towels, pet food, litter, or detergent are actually cheaper.
Convert sale, coupon, and loyalty prices into a fair per-unit comparison.
Compare price per roll, sheet, count, pound, fluid ounce, or tablet.
Decide whether a warehouse-club size is worth the storage space.
Teach price-per-unit and unit-rate shopping math in plain language.
Item B is about $0.3329/oz vs $0.3742/oz, saving about $0.0413/oz.
Item B is about $1.2490/roll vs $1.4983/roll, saving about $0.2493/roll.
Item B is about $1.9994/lb vs $2.3737/lb, saving about $0.3743/lb.
Item A is about $0.1738/fl oz vs $0.1952/fl oz, saving about $0.0214/fl oz.
Need a slower walkthrough, a related calculator, or the full library? These links keep you close to the task you started.
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 price per ounce for small and family-size grocery packages. Check whether bulk paper towels, pet food, litter, or detergent are actually cheaper. It works best when you already know the measurements, amounts, units, or options the page asks for.
In plain language: Unit price = item price / item quantity. The calculator finds each item's price per shared unit, identifies the lower unit price, then shows the savings per unit and savings percentage compared with the higher unit price. The examples on the page are there so you can compare your inputs with a worked example before copying the answer.
Item name: Optional labels that make the result easier to read, such as small box, family size, brand A, or bulk pack. Price: The shelf price, sale price, coupon-adjusted price, or receipt price you want to compare. Quantity: Package size for each product, entered in the same unit for a fair unit-price comparison. Shared unit: The unit both products use, such as oz, lb, count, roll, sheet, fl oz, mL, tablet, or bag.
Read the headline answer, then check the smaller lines beside it. For everyday tools, those lines usually show the distance, time, cost, units, or setting that made the answer change.
A lower unit price is not always the best choice if quality, expiration date, storage space, coupons, membership fees, delivery fees, sale limits, minimum quantities, or product differences matter. Make sure both items use the same unit and are actually comparable before choosing only by price. Also check the unit, scale, mode, and result limit because small input changes can change the answer.
Divide the item price by the package quantity. A $4.49 cereal box with 12 ounces costs about $0.3742 per ounce because 4.49 divided by 12 equals 0.374166....
Savings per unit is the difference between the higher unit price and the lower unit price. It shows how much cheaper the better item is for each ounce, pound, roll, count, or other shared unit.
Use the price you will actually pay. If a coupon, sale tag, loyalty discount, or membership price applies, enter that adjusted price so the comparison matches the real decision.
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.
Yes, if the products are close enough that price per unit is a fair comparison. If one item is higher quality, concentrated, organic, reusable, or packaged differently, treat the result as one clue instead of the whole decision.
Only if you include those amounts in the price fields. For real checkout math, adjust each item price for coupons, sales tax, shipping, delivery fees, deposits, or membership costs before comparing.
Price per ounce is one type of unit price. Unit price can also be price per pound, roll, sheet, count, fluid ounce, liter, tablet, or any other shared unit printed on the package.
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.