Compare up to 4 products and instantly find the best value per unit.
Stop doing complex calculations by hand or searching for formulas. Unit Price Calculator lets you compare up to 4 products and instantly find the best value per unit in seconds with a clean, easy-to-use interface. Enter your values and get instant, accurate results along with step-by-step breakdowns where applicable.
To compare products fairly, you must convert all quantities to the same unit before dividing by price. For example, comparing a 16 oz product ($3.99) to a 1 lb product ($3.49) — since 1 lb = 16 oz, both are the same size. This calculator automatically handles unit conversions so you can compare across oz, lb, g, kg, ml, and L.
Most grocery stores display unit prices on shelf tags in small print, typically in the format "$X.XX per oz" or "per 100g." These are calculated the same way as this tool. However, stores sometimes use different base units across products — like $/oz for one item and $/lb for a similar item — making direct comparison confusing. Always verify the unit shown.
Not always. Bulk is only worth it if: (1) you'll use all of it before it expires, (2) you have storage space, (3) the quality doesn't degrade over time. For perishables, a "worse" unit price on a smaller package can be better if the bulk option leads to food waste. Also factor in any membership fees (e.g. Costco) when evaluating true savings.