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Unit Price Comparison Calculator

Is the big pack really cheaper? Enter the price and size of each product and see which one costs the least per 100 g, per 100 ml or per piece.

Cheapest per 100 g

Product C

0.2425 per 100 g
  1. 1. Product C0.2425 per 100 g
  2. 2. Product B0.3333 per 100 g · +37.5%
  3. 3. Product A0.5 per 100 g · +106.2%
Products

How it works

  1. Name each product and enter its price.
  2. Enter the quantity and pick the unit — grams, kilograms, ounces, pounds, millilitres, litres or items.
  3. If you buy a multipack, enter the number of packs.
  4. Read the ranking: the cheapest is on top and the others show how much more they cost.

What people use it for

  • Supermarket shelves

    Compare a 750 g box with a 1.2 kg bag when the shelf labels use different units.

  • Bulk or multipack

    Check whether the family pack saves money compared with single packs.

  • Imperial and metric

    Compare a product sold by the pound with another sold by the kilogram.

Questions

How is the unit price calculated?
Price ÷ (quantity × number of packs), converted to grams or millilitres and multiplied by 100. For items counted one by one, it is the price per piece.
Can I compare grams with millilitres?
No. Weight and volume cannot be converted without knowing the density, so the tool asks you to compare products of the same kind: all by weight, all by volume or all by count.
Which conversion factors are used?
1 oz = 28.349523125 g, 1 lb = 453.59237 g, 1 US fl oz = 29.5735295625 ml and 1 US gal = 3,785.411784 ml. These are the exact definitions of the units.