How to read the result
The lowest unit price usually wins, but factor in whether you'll actually use the larger quantity before it spoils or expires. A great per-unit price on something you waste is no bargain.
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A unit price calculator divides a product's price by its quantity so you can compare options of different sizes on a like-for-like basis. It's the shopper's tool for cutting through package-size tricks and finding the genuinely cheaper option.
Unit price = Total price ÷ Quantity
Total price is what you pay, and quantity is the amount you get (ounces, grams, liters, count). The result is price per unit, which makes packages of different sizes directly comparable.
The lowest unit price usually wins, but factor in whether you'll actually use the larger quantity before it spoils or expires. A great per-unit price on something you waste is no bargain.