What if the two products use different units, like oz and mL?

The tool flags the mismatch and won't compute a comparison — convert one to match the other's unit first (most labels list a metric equivalent).

Does this account for sales tax or store loyalty discounts?

No — enter the final price you'd actually pay if you want tax or a discount reflected.

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Math & Everyday

Price Comparison Calculator

Compare unit price between two products to find the real better deal.

🔒 Runs entirely in your browser — nothing here is ever uploaded

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About the Price Comparison Calculator

Compares the true unit price of two products — price ÷ quantity — so a bigger package isn't automatically assumed to be the better deal.

100% Free Runs in Your Browser No Sign-Up Required

How to use it

Enter each product's price, quantity, and a unit label (e.g. "oz", "L", "count").
Use the same unit label for both products.
Read which product has the lower price per unit, and by how much.

Formula

unit price = price ÷ quantity

Worked example

Product A: $4.99 for 16 oz ($0.3119/oz). Product B: $8.49 for 32 oz ($0.2653/oz). Product B is about 15% cheaper per unit despite costing more upfront.

Recommendations

• Check the package label for a metric equivalent if the units don't match — this tool doesn't convert between unit types itself.
• A bulk size is only a real deal if you'll use it before it expires or spoils.
• Store shelf tags already show a "unit price" in small print — this tool is the same math, useful when comparing across different stores or brands.

Frequently asked questions

Products are packaged in dozens of different units (oz, lb, count, sheets, loads) — a free-text label keeps the tool flexible without needing a huge unit-conversion table.