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🍳 Recipe Scaler

Scale any recipe up or down to a new serving size — enter your ingredients once and let the calculator do the math.

🍽️ Recipe Details
📈 Scaled Ingredients
🍳

Enter your ingredients and click Scale Recipe

Guide

About the Recipe Scaler

This recipe scaler recalculates every ingredient quantity in a recipe when you change the number of servings — useful for doubling a recipe for a crowd, halving it for a smaller household, or adjusting to an odd serving count.

How It Works

The scale factor is simply desired servings ÷ original servings. Every ingredient quantity is multiplied by that same factor, so a recipe that serves 4 and needs 2 cups of flour becomes 4 cups of flour when scaled to 8 servings. Results are shown as a decimal and, where close to a common baking fraction, as a friendly fraction too (e.g. "3.5 (3 1/2)").

Why It Matters

Scaling by eye often leads to rounding errors that compound across many ingredients, especially with leavening agents like baking powder that don't always scale perfectly linearly in practice — this tool at least gets the linear math exactly right so you can adjust from there.

FAQ

Frequently Asked Questions

Common recipe scaling questions

How is the scale factor calculated?
The scale factor is desired servings ÷ original servings. Every ingredient quantity is multiplied by that same factor, so a recipe that serves 4 and needs 2 cups of flour becomes 4 cups of flour when scaled to 8 servings.
Does every ingredient scale exactly linearly?
Most do, but some — like spices, salt, leavening agents (baking soda/powder), and cooking times — don't always scale perfectly 1:1 in practice. Use the calculated amount as a strong starting point and adjust to taste for strongly-flavored or leavening ingredients.
What does the fraction in parentheses mean?
It's a "friendly" rounding of the decimal result to the nearest common cooking fraction (1/8, 1/4, 1/3, 1/2, 2/3, 3/4) so you don't have to mentally convert 3.5 into "3 and a half" yourself.
Can I use this to halve a recipe?
Yes — set Desired Servings to half of Original Servings (e.g. original 4, desired 2) and every ingredient will be scaled down by the same 0.5 factor.
Can I add or remove ingredients before scaling?
Yes — click "+ Add Ingredient" to add as many ingredient rows as your recipe needs, or click the ✕ button next to a row to remove it, before entering servings and clicking Scale Recipe.
Does the calculator scale cooking time or oven temperature?
No — only ingredient quantities are scaled. Cooking time and oven temperature don't scale linearly with batch size, so adjust those by judgment and by checking for doneness rather than multiplying by the scale factor.
What if an ingredient is listed as "to taste" or has no quantity?
Leave the quantity blank or skip that row — the calculator only scales rows that have both a name and a numeric quantity. Ingredients without a set quantity should be adjusted by taste after scaling the rest of the recipe.
Can I scale a recipe by more than double or triple?
Yes, there's no upper limit on the ratio — enter any positive serving count and every ingredient scales by the same factor. For very large batches you may also need a bigger pan or multiple batches, and cooking time may need separate adjustment.
Does the unit field convert between units, like cups to grams?
No — the Unit field is just a label carried through unchanged; the calculator multiplies the quantity by the scale factor but doesn't convert between measurement systems. Use our Cooking Measurement Converter if you also need to convert cups to grams or ounces to milliliters.
Why might a scaled quantity look odd, like 2.67 cups?
Scaling doesn't always land on round numbers. The calculator shows both the raw decimal and a rounded "friendly" fraction next to it, so you can use whichever is easier to measure with your kitchen tools.
Does pan size need to change when I scale a recipe?
The calculator doesn't adjust pan size — when you significantly increase a recipe, you'll typically need a larger pan or multiple pans, and that can change baking time too, even though the ingredient ratios stay the same.
Can I use non-integer serving counts?
Yes, Original Servings and Desired Servings both accept any positive number, so you can scale a recipe listed as serving "6-8" by entering 7, or target a specific fractional serving size if needed.

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