Grocery Unit Price Comparator

First, the calculator converts each package size into a standardized measurement: weights become grams, volumes become mL, and count items stay as item count. Then it calculates an effective unit price using your selected deal type (regular, BOGO, buy X get Y, or multi-pack). Finally, it reports comparable costs such as $/g (for weight items) and $/item (for count items), and ranks the cheapest option.

If you choose weight vs weight (oz/lb/kg), comparisons are straightforward. If you compare volume-based products (mL) without a density assumption, the tool keeps comparisons in $/mL rather than forcing a $/g comparison. The calculator also ignores taxes, coupons, loyalty discounts, and spoilage, so the result reflects the price and deal structure you enter.

Make sure the package quantity is greater than 0 and that the deal details match the deal type (e.g., BOGO should receive 2 units total). Also confirm you’re using the correct unit type for each product—count items compare by $/item, while physical goods compare by $/g or $/mL. If the store’s promo labeling differs from “standard” BOGO (like paying for 2 and getting 2), the results will be off unless you enter the structure correctly.