Unit Price Calculator (Price per Unit)
Unit price calculator: price per ounce, pound, liter or item, to compare package sizes in the store.
p = Pq
How to use this calculator
- Choose the quantity you want under “Solve for”.
- Type the known values and pick their units: any combination works.
- The result updates as you type. Open “Show the steps” to see the substitution.
Unit price = package price ÷ quantity. Enter quantities in the same unit for both products to compare which is the better deal.
Bigger packages are not always cheaper per unit, especially during promotions.
Formula
p = Pq
| Symbol | Quantity | Units |
|---|---|---|
| P | Package price | $, €, £ |
| q | Quantity (units, kg, L…) | — |
| p | Price per unit | $, €, £ |
Worked example
Given: P = 3.49 $ · q = 0.75
p = Pq
Result: p = 4.65 $
Frequently asked questions
Which is cheaper: 750 g for 3.49 or 1 kg for 4.79?
3.49 ÷ 0.75 = 4.65 per kg, so the 1 kg pack at 4.79 per kg costs slightly more.