Unit Price Comparison Calculator
Compare two products by their price and quantity to find the better value per unit. Enter the price and quantity for each option to instantly see which is cheaper on a per-unit basis. Perfect for grocery and bulk shopping.
How to use this tool
- Enter price 1, quantity 1, price 2 and quantity 2 in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your savings per unit (cheaper vs pricier) and the full breakdown beneath it.
Formula
Unit Price = Price / Quantity; Savings = |Unit Price 1 - Unit Price 2|
How it works
Divide each product's price by its quantity to get the unit price. Compare the two unit prices; the lower one is the better deal. The savings shows the difference per unit.
Worked example
$3.99 for 16 oz vs $5.49 for 24 oz
- Unit price 1: 3.99 / 16 = $0.2494 per oz
- Unit price 2: 5.49 / 24 = $0.2288 per oz
- Option 2 is cheaper by $0.0206 per oz
Common mistakes to avoid
- Comparing products with different units of measure (ounces vs grams) without converting first, making the comparison meaningless.
- Entering the number of packages rather than total units within each package, understating the per-unit price of multi-pack items.
- Ignoring quality differences; lowest unit price does not always represent best value if products differ in concentration or quality.
Key terms
Frequently asked questions
- How do I compare a 16 oz bottle at $3.49 with a 32 oz bottle at $5.99?
- Enter Price=3.49, Quantity=16 for Option 1 and Price=5.99, Quantity=32 for Option 2. The tool shows the per-ounce cost and flags the cheaper option.
- Can I use this for non-food items like paper towels or detergent?
- Yes. Any two products where you know price and a comparable quantity measure can be compared.
- What does the savings figure represent?
- It is the difference in unit price between the two options. Multiply by the quantity you plan to buy to estimate your total savings.