Free online calculator
Price per unit calculator
Compare products by unit price.
Compare unit prices
Add products with total price and quantity. The lowest valid unit price is highlighted.
How to use this calculator
- 1
Enter each product
Add a name, total price, and quantity.
- 2
Add more rows
Compare as many options as you need.
- 3
Check unit price
Review the cost per one unit for every row.
- 4
Pick best value
Use the highlighted row for the lowest unit cost.
Formula
Unit price: unit price = total price / quantity
The calculator applies the same formula to every valid row, then highlights the lowest unit price.
Worked example
Comparing two packs of sparkling water:
A 12-pack for $4.99 costs 4.99 / 12 = 0.42 per can. A 24-pack for $8.49 costs 8.49 / 24 = 0.35 per can, so the larger pack is the better value.
FAQ
How do you calculate price per unit? +
Calculate price per unit by dividing total price by quantity. A $6 pack with 12 units costs $0.50 per unit.
What does price per unit mean? +
Price per unit means the cost of one item, ounce, litre, gram, or other comparable unit. It helps compare packages of different sizes.
Which product is the best value? +
The best value is the valid product with the lowest price per unit. This calculator highlights that row automatically.
Can I compare different units? +
You should compare products using the same unit. Convert quantities first if one item is in ounces and another is in grams.
Does a lower unit price always mean the better buy? +
A lower unit price usually means better value, but only if you will actually use the larger quantity before it expires or goes to waste.
About this calculator
This price per unit calculator compares products by cost and quantity so you can spot the best value quickly. Use it for groceries, subscriptions, bulk packs, refills, and any shelf label that makes comparison harder than it should be.
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Catch the tiny purchases that add up
Spendspace keeps repeat shopping costs visible by category, so the cheaper unit price can turn into real monthly savings.
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