About the Unit Price Calculator
Enter the price and size of two options to compare their price per unit and see which is truly cheaper — because the bigger package isn't always the better value.
How it’s calculated
Price per unit = price ÷ size. The lower price per unit is the better deal.
Example calculation
$4.99 for 16 oz is $0.312/oz, while $7.49 for 28 oz is $0.268/oz — the larger size is about 14% cheaper per ounce.
Frequently asked questions
Do the two sizes need the same unit?
Yes — compare ounces to ounces, or grams to grams. Mixing units (ounces vs. grams) would make the comparison meaningless.
Is the bigger size always cheaper per unit?
Usually, but not always — 'bonus' sizes and promotions sometimes make a smaller package cheaper per unit, which is exactly what this calculator catches.
This tool provides estimates for general informational and educational purposes only. Results are based on the values you enter and standard formulas, and may not reflect your specific circumstances.