Unit Price Calculator
Which package is actually cheaper? Compare price per unit and spot the real deal.
Better deal
How to use the unit price calculator
- Enter each product's price and quantity (weight, volume, or count).
- Pick the unit they share.
- The cheaper per-unit option is declared the winner instantly.
Why unit pricing matters
Grocery packaging is engineered to make comparison hard: the big box looks like a deal until you divide by the ounces. Unit pricing cuts through it — price divided by quantity, compared apples to apples. The classic traps: the “value size” that costs more per ounce than the regular size, the two-for deal that is just the regular price doubled, and bulk quantities you will never finish before they expire (the cheapest per-unit price is not a deal if half goes in the trash). Store shelf tags often show unit prices in tiny print, but they vanish online and vary by store, so running the numbers yourself takes ten seconds and routinely saves real money across a full cart.
Frequently asked questions
What is unit price?
The price of one unit of a product — per ounce, per pound, per item. Comparing unit prices is the only fair way to compare different-sized packages.
Is the bigger package always cheaper per unit?
Usually, but not always. Manufacturers know shoppers assume bulk = savings, and some “value packs” are priced higher per unit. Always check.
What if the products use different units?
Convert first — this calculator needs both in the same unit. (16 oz = 1 lb, 1000 g = 1 kg, 1000 ml = 1 L.)
Should I always buy the cheaper per-unit option?
Not if you will not use it up. Perishables, pantry items you will get bored of, and anything with an expiration date can make the “deal” more expensive in practice.