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Recipe Scaling Calculator

Food

Scale any recipe up or down instantly. Enter original and target servings, list your ingredients, and get every quantity recalculated proportionally.

Scaling Factor

2x

IngredientOriginal QtyUnitScaled Qty
400 g
200 g
100 g

What is a Recipe Scaling?

A Recipe Scaling Calculator adjusts every ingredient quantity in a recipe proportionally when you change the number of servings. Enter the recipe's original servings, your target servings, and list each ingredient with its quantity and unit — the calculator computes a single scaling factor (target ÷ original) and applies it to every row instantly, so a recipe written for 4 can become a recipe for 10, 20, or 2 without manual multiplication.

Recipe scaling is one of the most common tasks in both home and professional kitchens. A dinner party recipe needs to double for extra guests, a family recipe needs to shrink for a smaller household, or a catering order needs a 20x batch of a signature dish. Doing this by hand for a 10+ ingredient recipe is tedious and error-prone — a single miscalculated ratio can throw off the flavor balance of an entire dish.

The core formula is simple: Scaling Factor = Target Servings ÷ Original Servings, then New Quantity = Original Quantity × Scaling Factor for every ingredient. This calculator handles the arithmetic and displays both the original and scaled quantity side by side for every row, so you can shop and cook directly from the scaled column.

For a companion tool, the Recipe Cost Calculator computes the total cost of a recipe (scaled or not) and cost per serving, and the Baker's Percentage Calculator offers an alternative scaling method used specifically for bread and pastry formulas.

How to use this Recipe Scaling calculator

  1. Enter the original recipe's servings — the number of servings the recipe as written currently makes.
  2. Enter your target servings — how many servings you actually need.
  3. Add each ingredient with its name, original quantity, and unit (grams, cups, tablespoons, etc.) using the "+ Add Ingredient" button.
  4. Read the scaled quantities in the right-hand column of the table — these are your new amounts for every ingredient.
  5. Download or share the scaled recipe using the PDF or image export buttons for easy reference while shopping or cooking.

Formula & Methodology

The calculator uses direct proportional scaling:

Scaling Factor = Target Yield ÷ Original Yield

Scaled Quantity = Original Quantity × Scaling Factor

This assumes every ingredient scales linearly with servings, which holds true for the vast majority of ingredients (flour, sugar, liquids, proteins, vegetables). Two categories deserve extra attention when scaling significantly up or down: leavening agents (baking powder, baking soda, yeast), which often work best at slightly less than the full factor in large batches, and strong spices or salt, which many cooks scale conservatively (75-90% of the factor) and adjust to taste. Cooking and baking time do not scale linearly at all — always verify doneness independently rather than assuming a scaled recipe needs proportionally more time in the oven or on the stove.

Frequently Asked Questions

Scaling factor = Target servings ÷ Original servings. Multiply every ingredient quantity in the recipe by this factor. If a recipe serves 4 and you need 10 servings, the factor is 2.5 — 200 g of flour becomes 500 g, 2 eggs becomes 5 eggs. This calculator computes the factor automatically and applies it to every row you enter, so you never have to do the multiplication by hand.
No. Ingredient quantities scale linearly, but cooking time does not — a cake pan with 2.5x the batter takes longer to bake through, but not 2.5x longer. As a rule of thumb, increase cooking time by roughly the cube root of the volume increase, and always confirm doneness with a thermometer or toothpick test rather than relying on a scaled time alone.
Use caution when scaling leavening agents by the full factor for large batches. Baking powder, baking soda, and yeast often work slightly better at 80-90% of the fully scaled amount when a recipe is more than doubled, because too much leavening can cause a collapsed structure or an overly yeasty taste. For small scale-ups (under 2x), scaling the full amount is usually fine.
Yes. Enter the recipe's original servings and set the target servings lower — for example, original 6 servings scaled to 2 gives a factor of 0.33. This is useful for portioning a family recipe for a smaller household, or halving a recipe to test it before making a large batch.
The calculator supports common cooking units — grams, kilograms, milliliters, liters, cups, tablespoons, teaspoons, ounces, pounds, and count-based units like pieces. The unit itself does not change during scaling; only the quantity is multiplied by the scaling factor, so the unit you choose for each ingredient stays consistent between the original and scaled columns.
Volume (cups, tablespoons) and weight (grams, ounces) are different measures, and the conversion factor depends on the ingredient's density. A cup of flour weighs about 120-130 g, while a cup of sugar weighs about 200 g. If your recipe mixes both volume and weight units, convert everything to one system first for the most accurate scaling, since a kitchen scale gives more consistent results than measuring cups, especially for dry ingredients.
Scaling assumes every ingredient behaves identically at any batch size, which is not always true. Pan size and surface area change cooking time and evaporation rate, spices and salt often need less than the full scaling factor for large batches (start at 75-80% and adjust to taste), and mixing time may need to increase for larger batters to fully incorporate ingredients.
Scale the ingredient quantities first using this calculator, then use the [Recipe Cost Calculator](/recipe-cost-calculator/) with the new scaled quantities to get an updated total cost and cost per serving. Cost scales linearly with quantity in the same way ingredients do, since you are simply buying proportionally more of each ingredient.
There's no mathematical limit, but very large scale-ups (10x or more) for baked goods often behave differently than the math suggests, due to oven capacity, mixing bowl size, and heat distribution. For catering-size batches, professional kitchens typically test a recipe at an intermediate scale (for example 3x) before jumping straight to a 10x or 20x batch.
Recipe scaling multiplies every ingredient by the same factor based on servings. The [Baker's Percentage Calculator](/bakers-percentage-calculator/) instead expresses every ingredient as a percentage of the flour weight (fixed at 100%), which is the standard way professional bakers scale bread formulas to any batch size without needing a servings count at all.
Yes. If you cook one recipe as your base and want to batch-cook it for the week, set your target servings to the total number of portions you need (for example, 4 dinners × 4 people = 16 servings) and the calculator scales every ingredient for the full batch in one step.
Also known as
recipe scaling calculatorrecipe converterscale a reciperecipe multiplierrecipe resizer