This calculator helps New Zealand shoppers cut through confusing supermarket pricing by comparing products on a true unit price, the cost per 100 grams, per litre, or per item, so you can spot the genuinely cheaper option. You enter the price and size of two or more products, and the tool instantly shows which is better value, seeing through the larger pack that is not actually cheaper or the special that only looks like one. The breakdown shows the unit price of each option side by side, helping shoppers make quick, confident decisions at the shelf and save steadily on the weekly shop.
Product A
Product B
Product C (optional)
Unit price is shown per 100 units of size, so compare products measured the same way, for example both in grams or both in millilitres. The lowest unit price is the better value, regardless of pack size or specials.
The calculator divides each product price by its size and multiplies by 100, giving the price per 100 grams, millilitres or items, depending on how you measured. Putting these side by side shows which product genuinely costs less for the same amount, cutting through the larger pack that is not actually cheaper or the eye-catching special that still loses on value.
Product A at $4.50 for 500 grams is 90 cents per 100 grams. Product B at $7.00 for 900 grams is about 78 cents per 100 grams. Despite the higher sticker price, Product B is the better value per unit, which the calculator makes obvious at a glance.
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