Unit Price Comparison Calculator

Compare unit prices of two products to find the better value per ounce, count, or unit.

By Konstantin Iakovlev · Updated September 2026 · Source: BLS

Item A
$
Item B
$

Item A Unit Price

$0.499

Item B Unit Price

$0.425

Comparison

Item A ($5.99 / 12)$0.499 per unit
Item B ($8.49 / 20)$0.425 per unit
Better ValueItem B
Savings Per Unit$0.075
Savings %15.0%

Use the Unit Price Comparison Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only. Results are estimates based on the information you provide and the assumptions described on this page.

How It Works

Comparing two products fairly means looking past the sticker price to what each one costs per standard unit. The unit price is where real savings hide, especially on staples you buy again and again like detergent or snacks, and it points you toward the genuine best value rather than the flashiest deal.

The math is a single division per product: Total Price / Quantity. Take an item priced at $5.99 for 16 ounces; dividing gives a unit price of $0.374 per ounce. Running that same calculation on each option puts them on common ground, so you can see which one truly costs less per unit no matter how the package sizes differ.

Make sure the units genuinely match before you compare, ounces against ounces and not ounces against grams, or the result will mislead you. Bigger packages don't automatically win on a per-unit basis, which is easy to miss when you fixate on the total alone. And there are times a higher unit price earns its place, when quality or a brand you trust justifies paying a little more.

Example: Comparing Two Bags of Coffee

  1. 1 Product A: 'Morning Brew' coffee, 12 oz bag for $8.49. Product B: 'Daily Grind' coffee, 18 oz bag for $11.99. Enter $8.49 and 12 for Item A, $11.99 and 18 for Item B.
  2. 2 For Product A: $8.49 / 12 oz = $0.7075 per ounce, shown as $0.708. For Product B: $11.99 / 18 oz = $0.6661 per ounce, shown as $0.666.
  3. 3 The calculator marks Item B as the better value, with savings of $0.041 per unit, or 5.9% of Item A's unit price ($0.0414 / $0.7075).
  4. 4 In this scenario, 'Daily Grind' (Product B) costs more at the register but about 4 cents less per ounce, so it is the better buy if you will use the larger bag before it goes stale.

Source: BLS · Last updated: September 2026

Frequently Asked Questions

How do I calculate unit price?
Divide the total price by the quantity (ounces, count, or unit measure). A 32-ounce bottle for $4.00 has a unit price of $0.125 per ounce. A 16-ounce bottle for $2.50 is $0.156 per ounce, making the larger bottle the better value.
Is buying in bulk always cheaper per unit?
Often, but not always. Exceptions include when smaller sizes are on sale, when club store prices are higher than grocery store sales, or when products expire before you can use them.
Where can I find the unit price on store shelves?
Most grocery stores display the unit price on the shelf tag below the product, usually in small print showing price per ounce, per count, or per 100 count. If not displayed, divide the total price by the quantity on the label.

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