Groceries

See what changed inside the same box

Inside the box

The box stayed. The amount inside moved.

Enter the price and size from last time and from this time. The footnotes show the price per unit, which footnote is higher, and how far the size moved. No account. The answer stays on this page.

Not a store price.

Last time and this time

Same item. Not two different products on the shelf today.

Last time Name (optional) Price in dollars Size Unit

This time Name (optional) Price in dollars Size Unit

Dollars and cents, up to two decimal places. Size can use up to three decimal places. Ounces and pounds may mix, at 16 ounces in a pound. A count and milliliters may not mix with each other or with weight.

Inside the box

The box stayed. The amount inside moved. The large type is the price. The footnote is the price per unit.

Trust

How this is calculated

Unit price = price ÷ size. Size change = (this size − earlier size) ÷ earlier size. If one size is in pounds and the other in ounces, both are compared per ounce, using 16 ounces in a pound. Ounces are not converted to milliliters or to a count.

Sources

This uses only the numbers you type.

Assumptions

Last time and this time are the same item.
The sizes are the amounts you are paying for.
Example labels are made up and are not store prices.

What happens to these numbers

What you type is used only to calculate this page. It is not saved and not sent. Refreshing clears it.

Limits

This is not a store price check. It does not say a size change was announced or against a rule. It is not financial advice.

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