Price Per Unit Calculator
Updated on 22 Oct 2026 · Checked by Aotob
Option B costs 20% less per oz.
A is $0.009 and B is $0.007 per oz.
Option B is cheaper by
20%
Bigger packs are usually cheaper per unit, but not always. And it is only a saving if you use it all before it goes off.
Show the working
A: 4.50 ÷ 500 × 1 = 0.009
B: 7.20 ÷ 1,000 × 1 = 0.0072
Price per unit
| Option | Price | Size | Per oz |
|---|---|---|---|
| A | 4.50 | 500 | 0.009 |
| B | 7.20 | 1,000 | 0.007 |
Questions people ask
How is unit price worked out?
Price ÷ quantity. For grams and millilitres it is shown per 100, the way most shelf labels show it.
Is the bigger pack always cheaper?
Usually, but not always: offers on smaller packs can beat the big one. It is only a saving if you use it all.
Why compare per unit at all?
Shrinkflation: packs get smaller while prices stay the same. Unit price shows it.
Updated 22 Oct 2026Source: Standard maths; typical prices are averages, checked October 2026Checked by AotobPrices you enter.Report an issue