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Price per 100g 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.

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

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Comparing unit prices
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Result

This page opens the comparison with the price per 100 grams as the headline number — the unit European shelf labels most often use, and the handiest scale for snacks, cheese, coffee, sweets and anything sold in small packs.

Enter the price and weight of each product in grams, kilograms, ounces or pounds: 2.50 for 500 g becomes 0.50 per 100 g, while 4.00 for 1 kg is 0.40 per 100 g — so the kilogram pack is the better buy and the small one overpays by 25%. Up to four products are compared at once, with the cheapest highlighted.

The price per kilogram and per ounce are shown in the same cards, so you can cross-check the store's own unit label no matter which scale it uses. The finished comparison copies 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.