You can calculate the unit price using the unit price formula. Divide the item's total price by the number of units of the item:

unit price = total price / no. of units.

The per unit price is the price of an item per each unit that is purchased or sold. This is the same as the unit price, but worded in a different way.

The unit price is the cost per ounce, per pound, per kilogram, per liter, or other units of weight or volume of an item you want to buy.

For example, let's say you're hungry for pancakes and need to buy some flour. In the shop, you have two choices: a smaller package – $1 for 1 kg, and a larger one – $1.35 for 1.5 kg. You'd need to consider the unit price to know which is a better buy.