Sizu Home › Calculators › Unit-Price Comparator
Add the price and quantity of each option, then press Compare.
From the book — Chapter 1. The only fair comparison between two sizes is price per unit: divide the price by the quantity (grams, millilitres, sheets, washes — whatever you’re buying). The “family size” wins surprisingly often, but not always; this just settles it in a second.
Use the same unit for every row (all grams, or all litres) so the comparison is fair. Everything stays in your browser.