Grocery Calculator

Formula

Price per kilogram = pack price ÷ grams per pack × 1,000; basket total = pack price × pack count.

Worked example

With Price per pack: 4.5 currency units, Weight per pack: 750 g, Packs to buy: 3, price per kilogram is 6.00 currency units.

Inputs and calculation

Normalize the shelf price to one kilogram before comparing packages of different sizes. Separately multiply the individual pack price by the number of packs you intend to place in the basket. The displayed relationship is Price per kilogram = pack price ÷ grams per pack × 1,000; basket total = pack price × pack count. Keep the fields' displayed units attached when reproducing this relationship by hand.

Worked numerical example

For example, enter price per pack 4.5 currency units, weight per pack 750 g, packs to buy 3. Those inputs produce price per kilogram of 6 currency units. The same values also give basket total 13.5 currency units.

Holding the other example values fixed, change price per pack from 4.5 to 4.95 currency units. The main output becomes 6.6 currency units. This comparison isolates the effect of that one input.

How to read and use the result

The kilogram figure compares the entered product by weight; it is not the price of one pack. The basket total covers only this item and the number of packs entered. Check a pantry item's unit cost and immediate basket spending while shopping.

Practical context

A 750 g package priced at 4.50 costs 6.00 per kilogram. If another brand costs 5.60 for 800 g, its kilogram price is 7.00 even though the packs look close in price.

Assumptions and scope

The labelled weight is the comparable edible or purchased quantity. Currency is left generic, and promotions are reflected only if the entered pack price already includes them. Replace the example defaults with measured inputs for your situation and account separately for factors outside these fields.

Checks and common mistakes

Do not compare a drained weight with another product's full container weight. Quality, waste, storage and spoilage can outweigh a small difference in unit price.

Common questions

What should I verify before using the Grocery Calculator result?

Unit price is useful when package sizes change quietly, but it is only one decision factor. Compare the same edible portion, check whether a promotional limit applies, and ask whether your household will finish the larger pack before it spoils. The basket total can then be checked against a shopping budget.