Compare two or more products by price-per-unit to instantly find which one is the better deal.
Unit price is the cost per single unit of measurement (like per gram, per liter, or per piece), calculated by dividing total price by total quantity.
Products come in different package sizes, so comparing total prices alone can be misleading — a bigger package costing more might actually be cheaper per unit.
Yes, add as many products as you want to compare using the "Add Product" button.
This tool calculates the price-per-unit for each product you enter — dividing total price by quantity — and ranks them so you can instantly see which option offers the best value, regardless of package size.
Products are frequently sold in different package sizes, which makes comparing raw prices misleading. A 1kg bag at $2.50 and a 500g bag at $1.50 have very different total prices, but calculating the unit price reveals the 1kg bag actually costs less per gram ($0.0025/g vs $0.003/g) — making it the better deal despite the higher upfront cost. This kind of comparison is exactly what unit pricing labels on grocery store shelves are designed to help with, and this tool does the same calculation for any products you enter.
All calculations run directly in your browser — no product or price details are sent to a server.
For each product, the tool divides the price you entered by the quantity you entered, producing a straightforward price-per-unit figure (price ÷ quantity = unit price). It then sorts every product from lowest to highest unit price and marks the cheapest one as the best value, while showing how much more expensive each other option is as a percentage relative to that cheapest price.
This comparison only gives an accurate result when every product's quantity is entered in the same unit of measurement. If one product is listed in grams and another in kilograms, convert them to a common unit first (for example, 1kg becomes 1000g) before entering the values, otherwise the calculated unit prices won't be comparable. A unit converter tool can help with this conversion step if the packaging labels use different units.
Retailers sometimes reduce a package's size while keeping the price the same — a practice often called "shrinkflation" — which makes the per-unit cost increase even though the shelf price looks unchanged. Because this tool calculates true cost per unit rather than relying on sticker price alone, it catches these size reductions that a quick glance at two price tags would miss.
Anyone trying to stretch a grocery or household budget can use this before checkout to settle a toss-up between two brands or sizes of the same product, rather than guessing based on which package looks like better value. It's particularly useful when store shelf labels either lack a unit price tag or display it in a unit that's hard to compare at a glance, such as "per 100g" on one item and "per item" on another.
Shoppers searching for this type of tool often use phrases like "price per ounce calculator," "cost per unit calculator," "which size is cheaper calculator," "grocery unit price comparison," and "bulk buying savings calculator." This tool's multi-product comparison and ranked results address all of these directly.
Store shelves often carry three or four sizes of the same item side by side — small, medium, large, and a bulk "value" pack. Rather than running pairwise comparisons in your head, add every size as a separate product row here and compare them all in one pass; the ranked results immediately show which size actually delivers the lowest cost per unit, and by how much the others fall short.
Because the calculator runs entirely in the browser with no account or data entry saved anywhere, it's quick to open on a phone in the store aisle, type in two price tags, and get an instant verdict before deciding what goes in the cart. There's nothing to set up in advance, and the default two product rows are pre-filled with example values just to show the format expected.