Recipe scaler — resize any recipe by servings
Turn a four-serving ingredient list into six, halve a batch, or enter your own multiplier. Fractions and ranges are supported; the units and ingredient notes stay as written.
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Check the list before cooking. Every recognised leading quantity uses the same factor. The ingredient flags are reminders to review, not instructions to reduce salt, yeast or raising agents. Keep your recipe’s proportions as the starting point. If you need part of a whole egg that will be mixed into a batter, whisk it and weigh out the required portion.
The multiplier does not calculate a new cooking time or temperature. Check the equipment, room for rising and recipe’s doneness cues separately. Quantities in brackets and instructions stay unchanged, so correct them in your saved copy if needed. Units stay as written; the cooking converter provides separate ingredient-based volume and weight conversions.
From four servings to six
Set Original servings to 4 and Servings you want to 6 to multiply the ingredients by 1.5. With Kitchen fractions (3/4) selected, these example lines become the quantities below. They are not a complete recipe.
| Original line | Scaled line |
|---|---|
| 200 g plain flour | 300 g plain flour |
| 3/4 cup milk | 1 1/8 cup milk |
| 1½ tbsp olive oil | 2 1/4 tbsp olive oil |
| 2–3 cloves garlic | 3–4 1/2 cloves garlic |
| 3 large eggs | 4 1/2 large eggs |
| salt to taste | salt to taste |
Lines scaled reads 5 of 6 because “salt to taste” has no number to multiply. The milk becomes 1 1/8 cup, or 1.13 cup with Decimals (0.75) selected.
Settle the awkward quantities before cooking
Half an egg: for an egg that will be mixed into a batter, whisk it, then weigh out half. For the example above, use four whole eggs plus half of the whisked egg. See King Arthur Baking’s guide to reducing a recipe. Measure yolks or whites separately if that is what the recipe calls for.
A different baking tin: check the size with the baking pan converter and leave room for rising. Multiplying ingredients does not give you a new baking time; use the recipe’s doneness cues to check the bake.
How to use
- Choose the new batch size. Under Scale by, choose Servings and fill in Original servings and Servings you want. For a half or double batch, choose A multiplier and use ×0.5 or ×2.
- Paste the ingredients. Put one ingredient on each line, with the quantity first: 3/4 cup milk, for example. Remove bullets and list numbers first.
- Review the scaled list. Choose Kitchen fractions (3/4) or Decimals (0.75). Check Lines scaled and the Needs a decision notes; lines with no recognised starting quantity stay unchanged.
- Save it for cooking. Use Copy scaled recipe, Download .txt or Print. Check bracketed quantities and the recipe instructions separately before you start.
Questions
Which quantities can I paste?
Start the line with a whole number, a decimal such as 1.5 or 1,5, a fraction such as 3/4, a mixed number such as 1 1/2 or 2½, or a range such as 2–3. Prefixes such as “about” and “~” are kept. Write 0.5 rather than .5, and leave out thousands separators.
Can I use fractions in the serving boxes?
Use decimal numbers with a point there: 1.5 rather than 1 1/2. The multiplier also needs a decimal, so use 0.5 to halve a batch. Fractions are understood in ingredient lines, not in those controls.
Why are eggs, salt or yeast flagged?
These are word-based reminders to review the recipe, not tailored adjustments. Their quantities are still multiplied by the same factor as everything else. A flag does not mean you should reduce an ingredient; “cloves garlic” is also flagged simply because it contains “cloves”.
Why has a quantity in brackets stayed the same?
Only the leading quantity or range changes. At ×2, “200 g flour (about 1 1/2 cups)” becomes “400 g flour (about 1 1/2 cups)”. The cup equivalent is now out of date and needs editing in your saved copy. Pack sizes behave the same way: “2 × 400 g tins” becomes “4 × 400 g tins”.
Are the displayed quantities exact?
They can be rounded. Kitchen fractions chooses a nearby common fraction when one fits, and uses decimals otherwise. Decimals shows up to two decimal places. Very small amounts can display as zero, so compare those with the original before measuring.
Will cups become grams, or cooking time change?
No. The units and instructions stay as written. At ×3, “500 g flour” becomes “1500 g flour”. Check cooking time, equipment and doneness separately rather than multiplying them with the ingredients.
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