Paste your ingredient list below and we will automatically scale all the numbers to fit your desired number of servings.
Recipe Multiplier
1.50x
Paste your ingredients here. Fractions like 1/2 or 1 1/2 work too — they'll be converted to decimals automatically.
Auto-calculated results.
Last updated: August 2026
The Easiest Way to Resize a Recipe
Found a great chili recipe that serves 4, but you're hosting a football party for 12? Or maybe you want to cut a massive batch of cookies in half? Our Recipe Scaler does all the math for you instantly.
How the Math Works
Scaling a recipe is a simple matter of finding the "multiplier." The formula is:
Desired Servings ÷ Original Servings = Multiplier
If you want 12 servings from a recipe that originally makes 4, your multiplier is 3 (12 ÷ 4 = 3). You then multiply every ingredient by 3.
Worked Example
Say your original recipe (serves 4) calls for 2 cups flour, 1.5 tsp baking soda, and 0.5 cup sugar, and you want to scale it up to 6 servings.
Multiplier = 6 ÷ 4 = 1.5x
2 cups flour → 2 × 1.5 = 3 cups flour
1.5 tsp baking soda → 1.5 × 1.5 = 2.25 tsp baking soda
0.5 cup sugar → 0.5 × 1.5 = 0.75 cup sugar
Fractions work too: an ingredient written as 1/2 cup is automatically read as 0.5 and scaled the same way, and a mixed number like 1 1/2 cups is read as 1.5.
Smart Tips for Scaling Recipes
Fractions or decimals both work: type 1 1/2 or 1.5 — the scaler converts fractions to decimals automatically before doing the math.
Watch Your Pan Sizes: If you double a cake recipe, you cannot bake it in the original pan. You will either need to use two pans or use our Cake Pan Size Converter to find the right vessel.
Cooking Times May Vary: Doubling a soup recipe means there is more liquid in the pot, which will take longer to bring to a boil. However, if you are baking two separate trays of cookies instead of one, the baking time remains the exact same.
Keep instructions out of the ingredient box: only paste ingredient quantities — the tool scales every number it sees, so an oven temperature or pan size pasted alongside ingredients will get scaled too.
Frequently Asked Questions
To scale a recipe, divide your desired number of servings by the original number of servings to get your multiplier. Then, multiply every ingredient in the recipe by that multiplier.
Yes, you can easily double the ingredients in a baking recipe. However, you may need to use a larger pan or bake it in two separate batches. Baking times may also change if you change the pan size.
When doubling a savory recipe (like a soup or stew), it's often best to only increase strong spices (like cayenne or salt) by 1.5x initially, then taste and adjust. For baking, you should double all spices exactly.
Yes. Simple fractions (1/2) and mixed numbers (1 1/2) are automatically converted to decimals and scaled correctly. You can also type decimals directly (1.5 instead of 1 1/2) if you prefer.
Scaling doesn't always produce clean numbers — for example, halving 1 cup gives 0.5 cups, but scaling 2 cups to serve 3 people from a 4-serving recipe gives 1.5 cups. Round to the nearest practical kitchen measurement (like the closest tablespoon or 1/4 cup) when a decimal is awkward to measure directly.
Yes. If your desired servings are fewer than the original, the multiplier will be less than 1, and every ingredient amount will shrink proportionally.
Not automatically — this tool only scales ingredient quantities. Baking times depend on pan size and thickness, not total ingredient volume, so a doubled batch baked in the same size pan (just more of them) usually bakes for about the same time; a single larger pan may need longer.
The scaler multiplies every number it finds, so keep instructions like oven temperature or pan size out of the ingredient box — paste only the ingredient list with quantities to avoid those numbers being scaled incorrectly.
