Two cereal box sizes
Input
A: $3.49 for 12 oz · B: $4.99 for 20 ozOutput
A: $0.291/oz · B: $0.250/oz — B is cheaper per ounce3.49÷12 ≈ 0.291; 4.99÷20 ≈ 0.250.
Option A: $0.2908 per unit
Option B: $0.2495 per unit — best value
Enter price and quantity for two or more options to see cost per unit and which package is cheaper per ounce, count, or item.
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A unit price calculator divides total price by quantity to show cost per unit and highlights which package offers the lower per-unit price.
A unit price calculator divides total price by quantity to show cost per unit and highlights which package offers the lower per-unit price.
Unit price = price ÷ quantity. Comparing unit prices normalizes different package sizes (e.g. 12 oz vs 20 oz) so you see the true per-ounce or per-item cost.
Price per unit = price ÷ quantity; lowest value wins when units match.
Formula
Unit price = price ÷ quantityFor each option, type the shelf price and the quantity (count, weight, or volume in one unit).
The calculator shows price per unit for each row and marks the lower per-unit option.
Use the winning row’s unit price to compare store brands or bulk sizes without mental division.
Input
A: $3.49 for 12 oz · B: $4.99 for 20 ozOutput
A: $0.291/oz · B: $0.250/oz — B is cheaper per ounce3.49÷12 ≈ 0.291; 4.99÷20 ≈ 0.250.
Common real-world scenarios where this tool saves time.
Compare cost per ounce or per count between two package sizes.
See whether a multi-pack actually costs less per item than singles.
Normalize price per sheet, per liter, or per piece for office or household supplies.
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Unit price = total price ÷ quantity. Example: $5.99 for 20 units → $0.2995 per unit.
The option with the lower unit price costs less per ounce, count, or item — assuming the same product and unit.
Yes. Enter both quantities in the same unit (e.g. both in ounces) so the comparison is valid.
More free tools for the same workflow.
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Reviewed by EverydayTools Editorial Team on 2026-05-18.