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Unit price from price and quantity
The core division. The result carries units of currency per unit of goods, so 4.50 over 750 g gives 0.006 per gram.
The Formula
Unit price = price / quantity
The core division. The result carries units of currency per unit of goods, so 4.50 over 750 g gives 0.006 per gram.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| P | Price of the pack | currency | The shelf price in your currency, before any loyalty discount. |
| Q | Quantity in the pack | goods unit | Net weight, volume or count — the same unit for every pack you compare. |
| U | Unit price | currency per goods unit | The comparable rate, in currency per gram, per litre or per item. |
What Each Symbol Means
Pcurrency
Price of the pack
The shelf price in your currency, before any loyalty discount.
Qgoods unit
Quantity in the pack
Net weight, volume or count — the same unit for every pack you compare.
Ucurrency per goods unit
Unit price
The comparable rate, in currency per gram, per litre or per item.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate unit price page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate Unit Price, filed under Everyday Life. Every number the guide produces comes from substituting into this one line.