How to calculate unit price
Unit price = Price ÷ Size
Worked example. Item B is the better deal: 14.2% cheaper per unit.
Example inputs — Item A price: $4.99; Item A size: 16 units; Item B price: $7.49; Item B size: 28 units. Starting values are illustrative.
From George Guju, founder of Calculyn · Educational calculator guidance, not professional advice.
How it works
Divide each price by its size in the same unit (ounces, grams, count). The lower price per unit is the better value.
Assumptions & limitations
- Results are rounded for display.
Formula and assumptions reviewed October 2026 by the Calculyn team. How we build our calculators
Frequently asked questions
Do sizes need the same unit?
Yes — convert both to ounces, grams or count first.