Unit Price Calculator
Example: $3.99 for 12 oz vs $5.99 for 20 oz: which is cheaper?
Compare unit prices by entering the price and quantity of two or more products. The calculator identifies the lowest cost per unit and can be used for grocery and bulk-buying comparisons.
Price per unit, best value first
Best Deal
Item 1 Unit Price
Item 2 Unit Price
Item 3 Unit Price
Savings (per 100 units)
How We Calculate This
Unit price = Total price ÷ Quantity. The lowest unit price represents the best value. Savings calculated as the difference per 100 units between highest and lowest unit prices.
Methodology last reviewed: April 2022. How SparkCalc works
Sources: NIST: Handbook 130, Uniform Laws and Regulations (Uniform Unit Pricing Regulation) · NIST: Special Publication 1181, The Unit Pricing Guide: A Best Practice Approach · NIST: Best Practices for Uniform Unit Pricing (SP 1181 and Handbook 130 update)
Frequently Asked Questions
Is bigger always cheaper per unit?
Not always! While bulk sizes often have lower unit prices, sometimes smaller sizes go on sale or have promotions that make them the better deal. Always compare unit prices.
How do stores calculate unit prices?
Stores typically show price per ounce, pound, or count on shelf tags. This calculator lets you compare when stores use different units or don't display unit prices.
Should I always buy the lowest unit price?
Consider: Will you use it all before it expires? Do you have storage space? Is the upfront cost within budget? Sometimes paying more per unit for a smaller size makes sense.
Related Calculators
You might also find these calculators helpful: Discount Calculator, and Percentage Calculator.
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Add this free calculator to your own website. Copy the code below and paste it into your page’s HTML. It is responsive and resizes to fit.