About the Unit Price Comparison Calculator
Compare products by price per unit to find which pack is genuinely better value.
Also known as: price per unit calculator, which is cheaper, cost per kg comparison, value for money calculator.
How to use this calculator
- Enter product a price, product a size, product b price, product b size and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
unit price = price ÷ size
Worked example
Using the values pre-filled in the calculator above:
- Product A price = 3.5
- Product A size = 500
- Product B price = 6.2
- Product B size = 1,000
- Product C price = 0
- Product C size = 0
- Unit: grams
the calculator returns:
- Best value: Product B
- Price per 100 g: 0.62
- Cheaper than the worst option by: 11.43%
- Saving per 1000 units: 0.8