Unit price comparison
Compare packages of different sizes using a common unit for mass, volume, length or quantity. Change the inputs to update the chart or diagram.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
Calculations run in your browser. Inputs are not saved or sent to analytics.
How it works
- Price per comparison unit = ÷ ( × × f)
- Worked example: 4 ÷ 0.5 kg = 8/kg; 5.25 ÷ 0.75 kg = 7/kg
- Supported input limits: Entries: 2–6
Input and formula key
Your result
Complete the inputs to see your result.
Assumptions and limitations
Enter the total pack price, the number of packs and the quantity in each pack. Compare like dimensions: mass with mass, volume with volume. The cheapest unit price does not account for quality, waste or delivery.
Sources
- NIST — conversion factor conventions Sources reviewed: 2026-10-06
- NIST — conversion factor table B.8 Sources reviewed: 2026-10-06
