Toolnido

Recipe Scaler: Double, Halve or Resize a Recipe

Paste your ingredient list, enter the old and new number of servings, and get every amount scaled with friendly fractions and tidy units. Optional ml and grams. Runs in your browser.

Servings
Ingredients

Start each line with the amount, such as 1 1/2 cups flour, 1/2 tsp salt, 2 eggs or 250 g butter. Fractions, decimals and ranges like 2-3 are read. Lines without an amount are left as written.

When to use this

  • A recipe serves 4 and you are cooking for 6, or you want half of it.
  • You want 1 1/2 times 3 tablespoons written as a measure you can actually use, not 4.5.
  • You want the scaled list in millilitres and grams for a scale or a metric kitchen.

How to use

  1. Enter how many servings the recipe makes and how many you want.
  2. Paste the ingredients, one per line, with the amount first, such as 2 cups flour.
  3. Choose whether to keep cups, spoons and ounces or convert to ml and grams.
  4. Press Scale recipe and read the table. Lines marked Check need a decision from you.
  5. Copy the scaled list, download a CSV, or print the page.

Examples

Understanding the result

Each amount at the start of a line is multiplied by the new servings divided by the old servings. Teaspoons, tablespoons and cups are rewritten in the largest unit that keeps the amount within 4 percent of the exact figure, then rounded to a fraction you can measure. Whole items such as eggs are rounded to the nearest half and flagged. Words after the amount are copied as written.

Limitations

FAQ

How do I scale a recipe up or down?

Divide the number of servings you want by the number the recipe makes, and multiply every ingredient by the result. This tool does it for each line and rewrites the amounts as measures you can use.

What do I do with half an egg?

The tool rounds whole items to the nearest half and marks the line. Many cooks beat an egg and use part of it by weight or volume, or round to a whole egg. Decide what suits your recipe.

Should I scale salt, spices and baking powder the same way?

Not always. They often do not scale in a straight line, especially for big changes. Treat the scaled amount as a starting point and check the original recipe.

Can I paste amounts like 1 1/2 or 1½?

Yes. Whole numbers, decimals, fractions such as 1/2, mixed numbers such as 1 1/2, the half and quarter symbols, and ranges such as 2-3 are all read.

Why is my 4 tablespoons now 1/4 cup?

The tool uses the larger unit when it is exact or very close, so 4 tablespoons and 1/4 cup are the same amount. Convert to ml and grams if you would rather weigh it.

Is my recipe saved anywhere?

No. Everything is calculated in your browser and nothing is sent to a server.

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