Recipe Scaler

Rescales a whole ingredient list at once when you cook for more or fewer people, double a recipe, or have only part of one ingredient. Amounts are read from pasted text in eleven languages, so a recipe copied from a website or a message works as it is.

How to use

1. Paste the ingredient list into "Ingredients (one per line)", or press "Load example" to see how it works.
2. Under "Scale by", choose "Servings" and enter "Recipe serves" and "I want to serve", or choose "Multiplier", or "Amount I have" to match one ingredient.
3. Read the list under "Scaled ingredients"; each changed line shows the original below it.
4. Open "Number style and units" to switch between fractions and decimals, convert to metric or US units, or turn off "Tidy units".
5. Press "Copy list" or "Print" to take the result with you.

How it works

• New amount = amount × factor; with servings the factor is people wanted ÷ people in the recipe. Ranges such as 2-3 are scaled at both ends.
• Lines without an amount ("salt to taste"), times and temperatures stay exactly as written. A line with a number that is not clearly an amount is kept and marked "Amount not recognized", never dropped.
• Unit conversion keeps volume as volume and weight as weight. A cup is 200, 236.6 or 250 mL depending on the setting "A cup in this recipe holds".

Questions and answers

How do I halve a recipe?

Choose "Multiplier" and press ×0.5. Two eggs become one, and 1 cup becomes ½ cup.

What do I do with 1.5 eggs?

Counted items keep their exact value and get a "Round to" note. Use the rounded number, or beat an extra egg and add half of it.

Do cooking times change when I double a recipe?

Not in proportion. A larger or deeper batch usually needs longer, so the tool leaves times alone and you check doneness.

Can it turn cups of flour into grams?

No, because the weight of a cup depends on the ingredient. Use the cooking measurement converter for that.