WHAT THIS TOOL DOES

This unit price calculator compares products by price per unit, so you can see which option is the best buy.

Use it for supermarket packs, bulk deals, refills, bottles, tins, bags, multipacks and household supplies.

Enter all quantities in the same unit, such as grams, millilitres or items.

HOW TO USE IT

Choose whether to compare per 1, per 100 or per 1000 units.

Enter the price and quantity for each option. Leave any unused option at quantity zero.

Press SOLVE to see the unit price for A, B and C, then read the best-buy result.

UNIT PRICE FORMULA

Unit price = price ÷ quantity.

To compare per 100 units, multiply the unit price by 100.

To compare per 1000 units, multiply the unit price by 1000.

The lowest unit price is the cheapest option.

WORKED EXAMPLE

Option A: £1.20 for 300g.

£1.20 ÷ 300 = £0.004 per g.

Per 100g: £0.004 × 100 = £0.40.

Repeat for each option. The lowest cost per 100g wins.

WHO USES IT

Shoppers use it to compare offers where the sticker prices are different and the pack sizes are not equal.

It helps compare groceries, detergents, pet food, refill packs, online listings and bulk-buy deals.

The tool is also useful for teaching proportion, rates and value-for-money calculations.

COMMON SEARCHES

unit price calculator, price per 100g calculator, price per ml calculator, best buy calculator, compare pack sizes.

Other searches include cheapest per kg, compare bottle sizes, price per item and supermarket value comparison.

Use the same quantity unit for each option before comparing.

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This page belongs to the utility calculators section.

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