Smart Math guide · Everyday Math

Compare Unit Prices

Divide total price by a common unit so differently sized packages can be compared fairly.

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The method

How to use it

  1. Convert package sizes to the same unit.
  2. Compute price ÷ quantity.
  3. Compare unit costs and consider quality or waste.
Worked example

See it in action

$6 for 24 oz = $0.25/oz; $5.50 for 20 oz = $0.275/oz.

Check your thinking

How to verify it

Multiply unit price back by package size to recover sticker price.

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