Unit Price Comparison
Compare two products by unit price. Find which is cheaper per kg, litre, or item. Free.
How to use
Beat supermarket pricing tricks
Supermarkets sometimes change the size on offer just enough to make "per 100g" comparisons hard. A bigger pack isn't always cheaper per unit — shrinkflation has made multi-packs particularly suspect. Unit-price labelling is a legal requirement in UK shops, but always double-check the maths.
How to compare
For weight items, the calculator divides by quantity to give a price per kg or per 100g. For liquids, per litre or per 100ml. For multi-packs, choose "per item" and enter the number of items. Always compare like with like — including for promotion offers like "3 for £5".