Unit Price Calculator

Compare two products by price per unit to find the better deal. Example: $4.99 for 16 ounces costs $0.312 per ounce, while $8.49 for 32 ounces costs $0.265 per ounce, which is 14.9% cheaper.

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Item A price

Item A quantity

Item B price

Item B quantity

How to use the Unit Price Calculator

Enter the price and size of each item in the same unit.
Press Calculate to see the price per unit and the better deal.

Formula and method

Unit price = price / quantity. The better deal has the lower unit price. Savings = (higher unit price – lower unit price) / higher unit price.

Worked example

Item	Price	Size	Per ounce
A	$4.99	16 oz	0.3119
B	$8.49	32 oz	0.2653
Savings with B			14.9%

Common unit conversions

Unit	Equals
1 pound	16 ounces
1 gallon	128 fluid ounces
1 liter	33.8 fluid ounces
1 kilogram	2.205 pounds
1 quart	32 fluid ounces

When the bigger size is not cheaper

Bulk packs usually cost less per unit, but not always. Compare the unit price, not the sticker price, and only buy more than you will use before it expires.

Frequently asked questions

How do I calculate unit price?

Divide the price by the quantity.

Is the bigger package always cheaper?

No. Compare unit prices.

What units should I use?

The same unit for both items, such as ounces or count.

How do I compare different units?

Convert both to one unit first.

What is a good saving?

Any lower unit price counts, but consider waste and storage.

Do coupons change the result?

Subtract the coupon from the price first.

Sources

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Effortless Math Team

25 minutes ago