Plan your shop
Unit price calculator
Compare two package sizes using your own prices. See the unit price and the cost of buying whole packages for the amount you need.
Fictional example result
Option A has the lower unit price.
| Measure | Option A | Option B |
|---|---|---|
| Price per 100 g | $0.40 | $0.45 |
| Whole packages | 2 | 3 |
| Amount bought | 1.8 kg | 1.5 kg |
| Amount left over | 300 g | 0 g |
| Package spending | $7.20 | $6.75 |
Option B requires $0.45 less spending for the required packages.
The lower unit price may require more spending for the whole packages you need. Unit prices are rounded to four decimal places; package spending uses the prices in cents that you entered.
Compare the amount you buy and the amount you need
Use the full outer-pack price and its total quantity. A multipack of six 200 mL containers contains 1200 mL. In the calculator, choose “Volume”. Enter 1200 in “Amount in the package”, then choose mL as the unit. Use no thousands separators. Compare it with another suitable option by volume. Keep mass, volume and item-count comparisons separate.
To try the count example, choose “Item count”. Use 12 items for $3.60 in Option A, 6 items for $2.25 in Option B, and 18 for “Amount needed”. These prices are fictional. The unit-price result and the amount you pay for enough whole packages answer different shopping questions.
Before choosing
Check the food and the trip too.
Compare products that fit your needs, using prices on the same basis. A size conversion does not resolve a different food type, ingredient or quality. This calculation uses your entries, not observed store prices.
Consider offer conditions, taxes, travel, delivery and the risk of waste before deciding where to buy.
Read the comparison guide →Compare your whole list too.
Choose your city and the stores you would actually visit to compare the items tracked by GroceryPulse.