How unit price is calculated
Dividing each product's price by its quantity gives the price per single unit, which puts differently sized packages on one comparable basis (dividing quantity by price for units per won ranks them the same way).
- price — total price of the package
- quantity — number of units (or weight/volume) in the package
More detail
Why compare unit price
A bigger package isn't always cheaper per unit. Comparing the total price alone can be misleading — dividing by quantity reveals which option truly costs less for the same amount.
Shopping tip. Many stores post a unit price on the shelf label — but when they don't, or when units differ (e.g. 500g vs. 1lb), converting both to the same unit before comparing avoids costly mistakes.
Frequently asked questions
How do I compare products in different units, like g vs. oz?
Convert both quantities to the same unit before entering them here — the calculator just divides price by whatever quantity you type in, so mismatched units (e.g. 500 g vs. 16 oz) will give a misleading comparison.
Is a bigger package always cheaper per unit?
Not always. Bulk sizes are often cheaper per unit, but promotions, store brands, or smaller competitor packs can undercut them. Enter both prices and quantities above to check rather than assuming.
What if the two products have the same unit price?
The calculator flags it as a tie — at that point, price alone doesn't decide, so factor in freshness, brand, or how much you'll actually use before it expires.