How to use the unit price calculator
- Enter the price and quantity of item A.
- Enter the price and quantity of item B.
- Read the price per unit for each and which one is cheaper.
Why unit price beats the sticker
A bigger box is not always cheaper. Dividing the price by the quantity reveals the real cost per unit, which is the only fair way to compare different pack sizes.
A worked example
Item A is $5 for 10 units = $0.50 per unit. Item B is $3 for 4 units = $0.75 per unit. Item A is the better deal even though the box is bigger and the total price higher.
Watch the units
Compare like with like. If one pack is weighed in grams and the other in ounces, convert to the same unit first, or the per-unit numbers will mislead you.