Recipe Scaler

Scale a list of ingredients

1. Enter how many servings the original recipe makes and how many you want. Both values must use the same idea of a serving.
2. Add an ingredient name, amount and optional unit for each measured ingredient. Use decimals or fractions such as 0.75, 3/4 or 1 1/2. Select Keep unchanged and add a note for an ingredient such as salt to taste.
3. Select Scale recipe. Read the result as exact fractions or decimals, check fractional items and unchanged notes, then copy the current list. Editing the recipe removes the previous result until you scale it again.

Understand the quantities

Every measured amount uses the same multiplier: target servings divided by original servings. Going from four servings to six gives a multiplier of 1 1/2. An amount of 1 1/2 cups therefore becomes 2 1/4 cups.

The unit stays exactly as you enter it. Cups stay cups and grams stay grams; the tool does not convert between them or assume what a cup of a particular ingredient weighs. Label ambiguous units clearly in your own list.

Fraction display is exact for accepted inputs. Decimal display uses at most six places and marks rounded values as approximate. A positive amount smaller than 0.000001 is shown as less than that threshold, not as zero.

Use a decimal point or comma, but no thousands separators: 1,000 means one, while 1000 means one thousand. Servings allow two decimal places; ingredient amounts allow six. A partial amount or missing ingredient name must be completed before scaling.

Check a few amounts

For four to six servings, 3/4 cup becomes 1 1/8 cups. The copied unit remains whatever you typed; the tool does not rewrite its spelling or plural form.

For twelve to five servings, 2 1/3 units becomes exactly 35/36 of a unit, or approximately 0.972222. A convenient nearby spoon fraction would change that amount, so none is chosen automatically.

Scaling one egg from four to six servings gives 1 1/2 eggs mathematically. Decide how to handle that ingredient in your actual recipe rather than silently rounding it. An explicit salt-to-taste note remains unchanged.

Amounts are only part of a recipe

This is proportional quantity arithmetic, not recipe testing. It does not determine cooking time, temperature, pan suitability, seasoning adjustments or food safety. Do not use it to change tested canning recipes.

Enter up to 30 ingredient rows. Servings range from 0.01 to 10000; each measured ingredient amount ranges from zero to 1000000. At least one measured ingredient is required. Names and unchanged notes allow 80 characters, and units allow 24.

The tool does not import recipes, interpret instructions, combine ingredients or calculate nutrition. It keeps a note unchanged only when you explicitly choose that option; it cannot decide which ingredients should scale differently.

Your ingredient list

Scaling takes place in your browser. This tool does not add ingredient uploads or save your list between visits. Copy sends the current summary to your clipboard only when you request it; existing site services still follow the site privacy policy.