A Product A
B Product B
How it works
- Enter Product A and Product B: price, quantity, and the unit each is sold in (oz, lb, ml, count, etc.).
- Check the units match — comparing price per oz vs. price per lb isn't valid. We'll warn you if the units differ.
- See the winner instantly: the product with the lower price per unit is the better value, with savings per unit and % cheaper shown.
- Use the comparison bars to visualize the gap — the shorter bar is the better deal.
Frequently Asked Questions
What is unit price?
Unit price is the cost of a single unit of a product — price divided by quantity. A $5.99 bag of 16 oz coffee has a unit price of about $0.37/oz. Comparing unit prices is the fairest way to judge which package size is the better deal.
Why is the bigger package sometimes more expensive per unit?
Bulk isn't always cheaper. Retailers know shoppers assume the big pack wins, so they sometimes price it higher per unit. Always check the shelf unit price (or use this calculator) instead of assuming.
Can I compare different units, like oz vs. lb?
Only if you convert first. This calculator warns you when units differ — either switch both to the same unit (e.g., convert lb to oz by multiplying by 16) or compare price per oz for both.
Does "better value" mean I should always buy the winner?
Not necessarily — consider waste (will you use it before it expires?), storage space, and cash flow. The winner is the better value per unit; your situation decides whether bulk makes sense.
What does "% cheaper" mean?
How much lower the winner's per-unit price is compared to the loser, as a percentage. If A costs $0.30/oz and B costs $0.40/oz, A is 25% cheaper per unit.