Unit price calculator
The grocery-aisle question: is the big one actually cheaper? Price and quantity for each option, winner announced.
Better value
—
—A per unit
—B per unit
—Cheaper by
Frequently asked questions
What is a unit price?
Price divided by quantity: cost per ounce, per roll, per load. It is the only fair way to compare a 12 oz jar at $3.49 against an 18 oz jar at $4.89 (29.1¢ vs 27.2¢ per ounce; the big jar wins).
Do the two options need the same units?
Yes, compare ounces to ounces or grams to grams. If one label is metric and the other imperial, convert one first; the unit converters on this site handle that.
Is bigger always cheaper per unit?
Usually but not always. Stores count on the assumption; "bulk traps" where the large size costs more per unit are common enough that checking pays for itself.