Unit Price Calculator

Find the best value when shopping: enter the price and size of up to four products and see the price per 100 g, kilogram, pound, ounce, 100 ml, litre, fluid ounce or item — even when the packs use different units — with the best value shown first.

This tool runs entirely in your browser.

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How to use the Unit Price Calculator

1Enter the price and size of each product and pick its unit (g, kg, oz, lb, ml, l, fl oz or items).
2Fill in at least two products — up to four.
3Read the best value and the price per unit for each product.

What is the Unit Price Calculator?

Unit price = price ÷ size, after converting sizes to a common base (grams, millilitres or items). That way a 500 g pack at 3.49 and a 1 kg pack at 5.99 compare directly: 0.698 versus 0.599 per 100 g.

Weight and volume can’t be compared with each other without the product’s density, so all products must use weight units, volume units or item counts.

Frequently asked questions

Is the bigger pack always cheaper?

Not always — promotions on small packs often beat bulk prices. That is exactly what comparing unit prices reveals.

Which currency does it use?

Any. Prices are shown without a currency symbol, so use whatever currency you shop in.

Is the Unit Price Calculator free and private?

Yes. The Unit Price Calculator is free, needs no account, and runs entirely in your browser. What you type is never sent to a server or stored.

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