Unit Price

2 Liters for $3.80

The "Unit Price" (or "unit cost") tells you the cost per liter, per kilogram, per pound, etc, of what you want to buy.

Just divide the cost by the quantity:

Example: 2 liters for $3.80 is $3.80/2 liters = $1.90 per liter

Comparing

Comparing Unit Prices can be a good way of finding which is the "best buy".

Example: What is best

  • 2 liters of Milk at $3.80, or
  • 1.5 liters of Milk at $2.70 ?

In this case the "Unit" is 1 liter, and the Unit Prices are:

  • $3.80 / 2 liters = $1.90 per liter
  • $2.70 / 1.5 liters = $1.80 per liter

So the lowest Unit Price (and the best bargain) is 1.5 liters at $2.70.

Of course it doesn't tell you the quality of what you are buying, but it can help you make a decision.

If something is sold in number of items (for example "10 pencils") then the same method can be used:

Example: What is best

  • 10 pencils for $4.00, or
  • 6 pencils for $2.70 ?

Here is the Unit Cost:

  • $4.00 / 10 = $0.40 per pencil
  • $2.70 / 6 = $0.45 per pencil

So the lowest Unit Price (and the best bargain) is 10 pencils for $4.00