What is a unit price calculator?
A unit price calculator converts package price and package size into a price per item, ounce, pound, gram, milliliter, or liter so you can compare two offers fairly.
Free Unit Price Calculator
A unit price calculator compares package sizes by converting each offer into a price per item, ounce, pound, gram, milliliter, or liter. Enter two package options to find the better deal after discounts and tax.
Use it for grocery shelf comparisons, multipacks, wholesale bundles, and ecommerce pricing decisions.
Compare packages
Option A
Option B
Unit price results
Prices include the shared discount and tax assumptions entered on the left.
24 oz jar
24 oz from $19.99 adjusted price
$0.83 / oz
3 lb multipack
48 oz from $34.99 adjusted price
$0.73 / oz
Buying insight
3 lb multipack saves $0.10 per oz, or 12.05% versus the higher unit price.
How to compare unit prices
- 1Enter the first packageAdd the label, package price, package quantity, and unit for the first option.
- 2Enter the comparison packageAdd the same details for the second option, such as a larger bag, multipack, or bulk size.
- 3Choose the target unitPick the unit you want to compare against, such as price per ounce, pound, gram, liter, or item.
- 4Review the better dealCompare adjusted price per unit, savings per unit, and percentage savings before buying or listing.
Unit price calculator FAQ
How do I compare different package sizes?
Enter each package price, quantity, and unit. The calculator normalizes compatible units, such as pounds to ounces or kilograms to grams, then compares the adjusted price per target unit.
Should unit price include tax?
Shelf tags often show unit price before tax, but business buyers may want after-tax comparisons. Use the tax field when both options share the same tax rate.
How do discounts affect unit price?
A discount lowers the adjusted package price before the unit price is calculated. Use the discount field for coupons, sale pricing, or seller-funded promotions that apply equally to both options.
Can sellers use this for product pricing?
Yes. Ecommerce sellers can compare pack sizes, multipacks, and cost basis before choosing a listing price or merchandising a bulk offer.
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Compare unit price with margin, markup, and wholesale pricing before you list.
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