This price per ounce calculator divides a product's cost by its weight to get a unit price, so you can compare packages fairly.
Everyday life
Price per Ounce Calculator
Compare unit prices per ounce to find the better deal.
Calculator
About this calculator
Formula notes
Unit price = cost ÷ (items × weight), with ounces converted through the exact relation 1 oz = 453.59237/16 g.
Worked examples
- Example: an 8-dollar item weighing 16 oz has a unit price of $0.50 per ounce.
- An 8-dollar, 16-ounce package has a unit price of $0.50 per ounce.
How to use it
- Enter the cost, number of items, and package weight.
- Choose the weight and price-per units.
- Repeat for each package and compare the resulting unit prices.
Frequently asked questions
Can I compare different weight units?
Yes. Each entry converts to the same canonical base before dividing, so ounces and grams can be compared through the displayed unit price.
What does the items field do?
It divides the cost when a package contains multiple identical items, giving a per-item unit price rather than per-package.
Limits and interpretation
- The unit price compares only the entered cost and weight; taxes, deposits, shipping, and package usability are not part of the calculation.
- Weights entered in different units are converted through exact definitions, so the displayed unit price depends on the chosen output unit.