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Price per Ounce Calculator

Compare 2–4 products by their real unit price: prices are normalized per 100 g, per kg, per litre, per ounce or per item, the cheapest one is highlighted and the rest show how many percent more they cost.

Item 1
Item 2

Items 3 and 4 are optional — leave them empty to compare just two products.

Item 3
Item 4

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Reading items
Normalizing units
Comparing unit prices
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Result

This page opens the comparison with the price per ounce as the headline number — the unit printed on US shelf tags — with rows preset to ounces and pounds: enter what each pack costs and its weight, and every product is restated as its cost per oz.

A 16 oz jar and a 1 lb jar are the same amount, but a 12 oz bag at 3.20 (0.267/oz) against a 1 lb bag at 4.00 (0.25/oz) is not obvious at a glance — the calculator normalizes them and shows the smaller bag costs about 7% more per ounce. Metric packs join the same comparison: grams and kilograms convert to ounces automatically.

Up to four products are compared at once, the cheapest per ounce is highlighted, and the price per 100 g and per kg appear alongside for imported goods labelled metric. Copy the whole comparison as plain text with one click.

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Accepted Formats & Rules

  • 2–4 item rows with an optional label, price, quantity and unit (g, kg, ml, l, oz, lb or item).
  • Normalized price per 100 g, per kg and per oz for weight, per 100 ml and per litre for volume, per item for counted packs.
  • Cheapest item highlighted, the rest tagged with the exact percent difference; one-click copy of the comparison.

Key Benefits

✓ Turns any mix of pack sizes into one comparable number, so 2.50 for 500 g and 4.00 for 1 kg stop looking similar (they are 5.00 vs 4.00 per kg).
✓ Highlights the cheapest item and prices every other item as a percentage more expensive — the overpay is visible at a glance.
✓ Unit-aware: grams, kilograms, ounces and pounds compare with each other, millilitres with litres, and counted items per piece.

Use Cases

  • • Compare 2.50 for 500 g against 4.00 for 1 kg and see instantly that the small pack costs 25% more per kilogram.
  • • Find the cheapest drink per litre among a can, a bottle and a family pack before taking one off the shelf.
  • • Check whether a multipack of 24 pieces really beats two packs of 10 by comparing the price per item.