Money calculator
Unit Price Calculator
Compare two package prices fairly, even when compatible unit sizes differ.
Best value
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Product A—
Product B—
Difference per unit—
Percentage difference—
How it works
The tool normalizes ounces with pounds, grams with kilograms, and milliliters with liters. It never compares mass, volume, and item counts directly.
Unit price = total price ÷ normalized quantity
Worked example
$10 for 5 items is $2/item; $12 for 8 is $1.50/item, so the second option is cheaper.
How to use this tool
- Enter the known values and choose units where available.
- Check the primary result and supporting details.
- Clear or replace an input to calculate another case.
Frequently asked questions
What happens with invalid or incomplete inputs?
The result remains blank until the required inputs form a finite, meaningful calculation. Zero denominators and physically impossible negative quantities are not calculated.
Can I use decimal values?
Yes. The tool accepts decimals and keeps full precision for the calculation while rounding the displayed result for readability.