Product B is the best value
$0.65 per 100 g. Only compare products in the same category (weight, volume, or per item).
Quick answer: To compare grocery products fairly, convert each to a unit price (price ÷ size in a common unit like price per ounce), then rank them. Our calculator compares up to four products side by side, handles different sizes and units, and names the best value instantly.
Evergreen method
Compare usable cost, not package price
The durable comparison is price per common unit adjusted for the share you will actually use.
Formula
usable unit cost = price ÷ (quantity × usable share)Reproducible steps
- 1.Convert every option to the same unit.
- 2.Estimate the share your household will use before spoilage.
- 3.Choose the lower usable unit cost only if storage and cash flow also work.
Data note — Evergreen model: The formula works with your own inputs and does not depend on a specific price or year.
FAQ
Questions, answered
How do I compare two grocery products with different sizes to see which is cheaper?
Convert each product to a unit price (price ÷ size in a common unit) rather than comparing sticker prices directly, since package sizes differ.
Is the store brand actually cheaper than the name brand?
Usually yes - store brands run about 25% less than name brands on average, but compare the actual unit price here to confirm for any specific product.
How do you compare products with different units, like ounces vs pounds?
This calculator automatically converts mismatched units to a common measure so you can compare products fairly, even if one is priced by the ounce and another by the pound.
Related
Keep going
Unit Price Calculator
Free unit price calculator — compare price per ounce, price per pound, or price per count across any package sizes to see instantly which grocery item is the better deal.
Bulk Buying Calculator
Is the bigger pack really cheaper? Our bulk buying calculator compares cost per unit and factors in spoilage risk before you buy in bulk.
Grocery Price Benchmark
Compare what you paid for 15 grocery staples, including eggs, milk, bread, chicken, beef and coffee against the official national average price, refreshed every month from BLS data.
Grocery Price History Charts
See how the price of eggs, milk, bread, beef, chicken, coffee and other staples has moved over the last 10 years, with monthly and yearly charts built from official BLS average-price data.
Unit Price Explained: How to Always Spot the Cheaper Option
Read guideIs Buying in Bulk Actually Cheaper?
Read guideStore Brand vs Name Brand: Is the Price Gap Worth It?
Read guide