Case 1
- Total price
- 4.99
- Quantity
- 500
0.009980
Open with these valuesUnit Price Calculator
0.009980
Result: 0.009980Divide the pack price by the quantity it contains. A 500 g bag at 4.99 works out at 0.00998 per gram, or 1.00 per 100 g. Compare that number, not the price on the shelf: a 250 g pack at 2.99 looks cheaper but costs 1.20 per 100 g.
Worked examples
Case 2
- Total price
- 2.5
- Quantity
- 1000
0.002500
Open with these valuesCase 3
- Total price
- 3.99
- Quantity
- 250
0.015960
Open with these valuesHow it's calculated
Unit price = total price ÷ quantity
- StepEnter the price you pay for the whole pack.
- StepEnter how much the pack contains — grams, millilitres, pieces.
- ResultCompare the unit price with the other pack, in the same unit.
Reference table
| Price, quantity | Per 100 | Price per unit |
|---|---|---|
| 2.50, 1000 | 0.25 | 0.0025 |
| 1.99, 750 | 0.27 | 0.002653 |
| 4.99, 500 | 1.00 | 0.00998 |
| 3.99, 250 | 1.60 | 0.01596 |
| 10, 1 | 1000.00 | 10 |
Questions
How do I calculate the unit price?
Divide the total price by the quantity in the pack. A 500 g bag costing 4.99 has a unit price of 4.99 ÷ 500 = 0.00998 per gram, or about 1.00 per 100 g.
What is unit price?
It is the cost of a single unit of the product — one gram, one millilitre, one sheet, one piece. Because it removes the effect of pack size, it lets you compare products sold in different amounts.
How do I compare two different pack sizes?
Work out the unit price for each, making sure both use the same unit, then take the smaller number. A 500 g pack at 4.99 beats a 250 g pack at 2.99, even though the smaller pack has the lower price tag.
What does price per 100 mean?
It is the unit price multiplied by 100 — what 100 units would cost. European shelf labels use it because it reads more easily than a per-gram figure with several leading zeros.
Is a lower unit price always the better deal?
Usually, but not always. A large pack only pays off if you use all of it; one that spoils first costs more in practice. Quality and how much you actually need count alongside the number.
Sources and last check
Information, not professional advice.