Unit Price Calculator
By using our calculators, you agree to our Terms of Use.
Which package is cheaper per unit? Enter price and quantity for two options.
Two packages
Better deal
Package B
A: $0.31/oz · B: $0.27/oz
- Package A unit price
- $0.31/oz
- Package B unit price
- $0.27/oz
- Unit price difference
- 14.2%
Related calculators
Comparing unit prices
Unit price divides total package cost by quantity — price per ounce, per pound, per gram, or per item. The lower unit price is the better value when product quality and brand are equivalent.
Stores sometimes show unit price on shelf tags, but formats differ (per oz vs per 100 g). This calculator compares two options directly using the quantities you enter — switch US or metric labels to match package markings.
Example: $4.99 for 16 oz vs $7.49 for 28 oz. Unit prices are $0.31/oz vs $0.27/oz — the larger bag saves about 13% per ounce. Watch for waste if the larger size spoils before use.
Common questions
Do quantities need the same unit?
Yes — enter both packages in the same unit (both ounces or both grams). Convert first if one label uses ml and another uses fl oz.
What if quality differs?
Unit price only compares cost per quantity. Organic, name-brand, or fresher products may be worth a higher unit price.
Does bulk always win?
Not always. Check expiration dates, storage space, and whether you will use the full quantity. Promotional smaller sizes can beat bulk temporarily.