Price Comparison (2 Items) Calculator

Work out price comparison (2 items) instantly with clear inputs, formula shown and shareable results.

About Price Comparison (2 Items) Calculator

Dividing price by quantity gives the only figure that compares directly. Expressing the gap as a percentage of the dearer option makes it concrete: a 10% unit price difference on a weekly purchase is real money over a year.

Formula

Unit comparison

unit price = price / quantity; saving = 1 - cheaper / dearer

Worked example

With the default values below, Price Comparison (2 Items) Calculator returns Cheaper per unit of Item B. Change any input above and every figure here is recalculated in your browser.

Inputs used

Item A price: 12.99
Item A quantity: 6 units
Item B price: 19.5
Item B quantity: 10 units

Results

Cheaper per unit: Item B
Item A per unit: $2.1650
Item B per unit: $1.9500
Saving with the cheaper option: 9.93% %

Step by step

1Values used
2Unit comparison
3Cheaper per unit= Item B
4Item A per unit= 2.1650
5Item B per unit= 1.9500
6Saving with the cheaper option= 9.93 %

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

What if the items are not identical?

Then unit price is only part of the answer. Adjust for quality, size or concentration before comparing, or you are pricing different things.

Why express the saving as a percentage?

Because absolute pennies mean little without context. A percentage tells you whether it is worth changing habits.