Everyday
Unit Price Calculator
Use this unit price calculator to compare grocery sizes, bulk packages, subscriptions, and any price-per-unit decision.
Better buy
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- Item A unit price
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- Item B unit price
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- Savings
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Student quick launch
Grade planning, algebra checks, and formulas students reach for most.
Study path
Use this calculator with
Follow these when you want the formula behind the answer, a short lesson, or nearby tools in the same topic.
What the unit price calculator solves
Use this unit price calculator to compare grocery sizes, bulk packages, subscriptions, and any price-per-unit decision.
Formula
How to use it
- Enter each item's price.
- Enter each quantity in the same unit.
- Choose the lower price per unit.
How to read the answer
The lower unit price is the better value if product quality and waste are similar.
Common mistakes and edge cases
- Use the same unit for both quantities.
- Bulk is not cheaper if you waste the extra product.
- Coupons and taxes can change the final unit price.
Worked examples
Grocery comparison
Better buy
Item B is cheaper per unit
Tie case
Better buy
Tie
Frequently asked questions
Can I use ounces or grams?+
Yes. Use any unit as long as both items use the same unit.
Is the lower unit price always better?+
Usually for identical products, but freshness, quality, storage, and waste still matter.
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Last updated: May 8, 2026