Percentage calculator
Work out percentages and changes.
Unit price calculator
Compare prices per kilo, litre or pack to find the best value.
Best valueProduct A
- Product A
- 480.00 per kg
- Product B
- 520.00 per kg
- Product A is cheaper than the dearest by
- 7.7%
Formula Unit price = price / quantity
Use the same unit for every product, for example all in kg or all in litres.
How it works
- 1Type the unit you are comparing, such as kg or litre.
- 2Enter the price and quantity of each product. Leave Product C empty if you only have two.
- 3Read the price per unit and the best value.
- 4Check that every quantity uses the same unit.
What the options do
- Quantity is in
- Only a label. It names the unit in the results.
- Products A, B and C
- Up to three products. A product with an empty or zero quantity is skipped.
Privacy
The numbers you enter are used in your browser only and are never sent to a server.
Questions people ask
How do I compare different pack sizes?
Convert them to one unit first. A 500 g pack is 0.5 kg, and 750 ml is 0.75 litre.
Is the cheapest per unit always the best buy?
Not always. A bigger pack saves nothing if you throw some away, and food has expiry dates. Consider how much you will really use.
How do I compare multipacks?
Enter the total pack size, for example 6 bottles of 0.5 litre is 3 litres.
What if I have more than three products?
Compare the best two first, then compare the winner with the next product.
Which currency does it use?
None. It divides price by quantity, so any currency works.