Recipe Scaler
Scale any recipe up or down by changing the number of servings.
Ingredients
Enter your ingredient amounts to see scaled values.
Scaled Ingredients
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
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Request a ToolHow to Use the Recipe Scaler
This tool adjusts every ingredient in a recipe when you change the number of servings. There is no math to do yourself: just enter your numbers and the results update instantly.
- Enter the original servings. This is the yield your recipe is written for, such as 4 servings or 12 cookies.
- Enter your desired servings. Type the number you actually need. The scale factor appears immediately, for example 2x to double the recipe or 0.5x to halve it.
- Add your ingredients. For each ingredient, enter the amount, choose a unit (cups, tablespoons, teaspoons, ounces, grams, milliliters, pounds, each, or pinch), and type the ingredient name. Click Add Ingredient for more rows.
- Read the scaled amounts. The Scaled Ingredients table shows the original amount and the new amount side by side, displayed as friendly fractions like 1/3 or 1 1/2 instead of decimals.
Use the Copy button to copy the full scaled ingredient list as plain text to paste into a shopping list or notes app. Use Share to copy a link with the serving numbers pre-filled so you can pick up where you left off.
About the Recipe Scaler
Scaling a recipe is straightforward: divide the desired servings by the original servings to get the scale factor, then multiply every ingredient amount by that factor. The challenge is displaying results in a way that is actually usable in the kitchen. Seeing 0.667 cups on a screen does not help when you are reaching for measuring cups. This tool converts scaled decimals back to the nearest common fraction (1/8, 1/4, 1/3, 3/8, 1/2, 5/8, 2/3, 3/4, 7/8) so the output reads like a real recipe.
All calculations run in your browser. Nothing is sent to a server. The tool works equally well for scaling up for a crowd or scaling down a large batch to a single portion.
Frequently Asked Questions
Can I use this to double or triple a recipe?
Yes. Enter the original servings and then enter a number that is two or three times larger. For a recipe that serves 4, enter 8 to double it or 12 to triple it. The scale factor will display as 2x or 3x and every ingredient will be multiplied accordingly.
Does scaling a recipe affect baking time or temperature?
Scaling ingredients is only part of adapting a baked recipe. Baking time and temperature do not scale linearly. If you double a cake recipe and bake it in a larger pan, the baking time changes because of the different depth of batter. As a rule of thumb, keep the temperature the same and start checking for doneness earlier than you think. If you are splitting a doubled recipe into two identical pans, the baking time stays roughly the same as the original.
Why does the tool show fractions instead of decimals?
Standard measuring cups and spoons are marked in fractions: 1/4 cup, 1/3 cup, 1/2 cup, 1 tablespoon, 1/2 teaspoon. Showing 0.333 cups is technically correct but not practical when you are standing at a counter. The tool rounds each result to the nearest common kitchen fraction so the output matches what you can actually measure.
What should I do about ingredients like eggs that cannot be divided?
Some ingredients, especially eggs, do not divide neatly. If scaling a 2-egg recipe to 1.5x gives you 3 eggs, that works perfectly. If it gives you 1.5 eggs, you have a few options: round up to 2 eggs (the recipe will be slightly richer), use one egg plus one egg yolk, or lightly beat an egg and measure out half by volume. For most recipes, rounding by one egg in either direction has a minor effect on the final result.