Unit Price Calculator
Compare prices and find the best deal
Item A
Item B
Results
Item A
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per unit
Item B
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per unit
Unit price is the only honest way to compare two products: how much does each gram, ounce, or liter actually cost? Enter the price and quantity of two items; the calculator shows each per-unit cost, flags the better deal, and gives the exact savings percentage. Built for grocery shoppers and bulk buyers.
How to Use
- Enter item one: Type its price, quantity, and unit — for example, $4.50 for 500 g.
- Enter item two: Do the same for the competing product, like $7.20 for 1 kg.
- Compare: Click compare — the cheaper item is highlighted with the savings percentage.
Why Unit Price Matters
Packaging is designed to make comparisons hard. The same product comes in 473 mL, 16 oz, and 1 L bottles; “value packs” sometimes cost more per ounce than the regular size; and shrinkflation quietly shrinks the contents while the price holds still. Dividing price by quantity cuts through all of it. A classic trap: compare toilet paper per roll and the bigger pack wins; compare per sheet and the answer often flips, because roll sizes vary wildly.
Features
- Compare two products side by side
- Weight (kg, g, lb, oz), volume (L, mL, gal), and count (each, dozen, pack) units
- Highlights the cheaper option with the savings percentage
Use Cases
- Grocery shopping: Choose between the 500 g and 1 kg bag of rice in seconds.
- Bulk buying: Check whether the warehouse club size really beats the supermarket.
- Sale evaluation: See if a “buy two” promo actually lowers the unit price.
Related Tools
Frequently Asked Questions
How is the unit price calculated?
The unit price is calculated by dividing the total price by the quantity. For example, if a 500g package costs $4, the unit price per gram is $4 / 500 = $0.008 per gram.
Can I compare items with different units?
Yes, the calculator computes the per-unit price regardless of the unit chosen. For example, you can compare $5 for 1kg vs $3 for 500g. The per-unit prices will show which is the better deal.
What units are supported?
The calculator supports kilogram (kg), gram (g), pound (lb), ounce (oz), liter (L), milliliter (mL), gallon (gal), each, dozen, and pack.
How is the savings percentage calculated?
Savings percentage is calculated as the difference between the higher and lower unit prices divided by the higher price. For example, if Item A costs $0.50/unit and Item B costs $0.40/unit, you save 20% with Item B.