Unit Price Calculator
Compare products by price per unit to find which is genuinely better value.
What the Unit Price Calculator does
Unit price divides cost by quantity, which is the only honest way to compare package sizes. Bigger packs are usually but not always cheaper per unit — retailers regularly price the middle size worst.
Formula
Unit price = Total price ÷ Quantity
Inputs explained
| Input | Unit | Required | Notes |
|---|---|---|---|
| Price of option A | selected currency | Yes | Accepts more than 0. |
| Quantity in option A | number | Yes | Accepts more than 0. |
| Price of option B | selected currency | Yes | Accepts more than 0. |
| Quantity in option B | number | Yes | Accepts more than 0. |
| Price of option C | selected currency | Optional | Accepts 0 or more. |
| Quantity in option C | number | Optional | Accepts 0 or more. |
| Currency | one of 10 options | Optional | — |
How to use it
- Choose Currency.
- Enter Price of option A, Quantity in option A, Price of option B and Quantity in option B.
- Optionally add Price of option C and Quantity in option C.
- Select Calculate.
Worked example
A 500 g pack for $4.20 against a 1.2 kg pack for $9.60.
- A price
- 4.20
- A quantity
- 500
- B price
- 9.60
- B quantity
- 1200
$0.0084 versus $0.0080 per gram — the larger pack is about 4.8% cheaper per unit.
Frequently asked questions
Is the biggest pack always cheapest per unit?
No. Check every time. And a lower unit price is no bargain if you will not use it before it spoils.