A unit price
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Unit Price Calculator
Two products, two sizes, two prices — which is the real bargain? Enter both, we show unit price side by side.
Product A
Product B
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Enter prices and sizes
B unit price
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Why unit price matters
$3.99 for 12 oz vs $5.29 for 20 oz — which is cheaper? Divide price by size: A = $0.333/oz, B = $0.265/oz. Product B looks pricier at the register but is actually 20% cheaper per ounce. Unit price is the single most reliable way to spot real bargains at the grocery store.
How to use it in the store
US stores are legally required to show unit prices on shelf tags — but labels are often tiny, inconsistent, or missing entirely. Jot price and size into this calculator and know which is truly better before you reach the register.
Frequently asked questions
What unit should I use?
Any — as long as both products match. Ounces, pounds, liters, milliliters, or "per item". Enter the label you want verbatim.
Coupons and sales?
Subtract coupon from the price before entering. $3.99 with $0.50 coupon → enter 3.49.
Is bigger always cheaper?
No. "Value" sizes sometimes markup per unit because people assume bigger = better deal. This calculator catches those tricks.
Organic vs conventional?
The calculator only answers "which is cheaper", not "which is healthier/ethical". Both questions are important — this one handles the first.
Perishables twist
Unit price is less useful if you will not finish the larger size before it expires. For milk, bread, produce — factor in what you will actually consume.
Last updated
For general calculations only. Not financial, tax, or legal advice — see our disclaimer.