Unit Price Calculator
Which product is actually cheaper? Compare cost per unit between any two options.
Stores price things in confusing ways on purpose. Two boxes of cereal, different sizes, different prices, different packaging. This calculator gives you the real cost per ounce or per item so you can see which is the better deal. Type in the price and size of each product, pick a unit, and the answer comes back instantly.
Product A
Product B
How unit pricing works
Unit price is what one product actually costs per standard unit, per ounce, per pound, per item, per serving. It's the only honest way to compare two products in different sizes. A 12-ounce bag of coffee at $9.99 ($0.83/oz) is actually more expensive than a 16-ounce bag at $11.99 ($0.75/oz), even though the bigger bag has the bigger sticker price.
When the bigger size isn't actually cheaper
Most of the time, buying bigger saves you money, but not always. Sale prices on smaller sizes, club-store bulk premiums, and "family pack" markups can flip the math. Always run the numbers. The store's shelf-edge unit price tag is sometimes correct, sometimes outdated, and sometimes uses a misleading unit (per-pound vs per-ounce). This tool gives you the real per-unit price in whatever unit you choose.
Common shopping examples
- Cereal: compare price per ounce, not per box
- Paper goods: price per sheet (toilet paper) or per square foot (paper towels)
- Beverages: price per fluid ounce, accounting for bottle deposit if applicable
- Vitamins/supplements: price per pill, not per bottle
- Pet food: price per pound, large bags usually win, but check