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Recipe Scaler Calculator

Enter the servings a recipe makes and the servings you want, and every ingredient is recalculated for you. Mixed fractions like 1 1/2 are read correctly and results round to friendly amounts.

Servings

Set what the recipe makes now and how many servings you want. Everything is calculated in your browser; nothing is uploaded.

One ingredient per line, each starting with its quantity. Lines without a leading number are kept as written.

Scaled recipe
×2
Multiply every quantity by this. Scaling from 4 to 8 servings.
4 cups flour
was 2
3 tsp baking powder
was 1 1/2
1 cup sugar
was 1/2
6 eggs
was 3
2 cup milk
was 1
1/2 tsp salt
was 1/4
Pinch of cinnamon

Show amounts as

How to scale a recipe to different servings

  1. Enter your servings

    Type the servings the recipe makes now and the number you want. The scale factor and results appear as soon as both numbers are valid.

  2. Paste the ingredients

    Put one ingredient per line, each starting with its quantity, like 1 1/2 cups flour. Lines without a number, such as salt to taste, pass through unchanged.

  3. Read or copy the scaled list

    Every quantity is multiplied by the scale factor and rounded to a friendly amount. Switch between fractions and decimals, then copy the new list.

Why use this tool

Mixed fractions read correctly

Quantities like 1 1/2, 3/4, or the ½ and ¾ symbols are parsed, scaled, and rounded back to the nearest eighth of a unit.

Text passes through untouched

Lines with no leading number, such as a pinch of salt or oil for frying, are kept exactly as you wrote them.

Fractions or decimals

Show scaled amounts as friendly fractions rounded to the nearest eighth, or as plain decimals for a kitchen scale.

Quick half, double, or triple

One tap fills in the desired servings for common scales, or type any target for an exact factor.

Runs entirely in your browser

Everything happens on your device; nothing is uploaded.

About this tool

A recipe scaler multiplies every ingredient in a recipe by the same factor so it matches the number of servings you actually want. Set the servings the recipe makes now and the servings you need, and the tool works out the scale factor, then rescales each quantity in your ingredient list. It reads whole numbers, decimals, simple fractions like 3/4, mixed numbers like 1 1/2, and the common fraction symbols, so you can paste a list straight from a cookbook or a website without reformatting it first.

Reach for it whenever the batch size on a recipe does not match your pan, your crowd, or your appetite. Halving a cake for two, tripling a sauce for a party, or taking a recipe for eight down to a single portion all come down to one multiplier, and doing that by hand across a dozen ingredients is where mistakes creep in. Scaled amounts round to the nearest eighth so they stay easy to measure, or you can switch to decimals for a kitchen scale. For the arithmetic behind an individual amount, the fraction calculator adds and multiplies fractions directly, and the unit converter handles cups, grams, and other measures.

Lines that do not start with a number, such as salt to taste or a splash of oil, are left exactly as written rather than forced into a calculation. Everything runs on the page, so your recipe is never uploaded, saved, or shared.

Frequently asked questions

How does it handle fractions like 1 1/2?
It reads mixed numbers, simple fractions, decimals, and the ½ style symbols, multiplies them by the scale factor, and rounds the result to the nearest eighth so the amount stays easy to measure.
What happens to lines without a quantity?
Any line that does not begin with a number, such as a pinch of salt or oil for frying, passes through unchanged. Only a leading quantity is scaled.
Can I scale a recipe down as well as up?
Yes. Set the desired servings lower than the original and every quantity shrinks by the same factor. The quick buttons also cover halving, doubling, and tripling.
Why do the scaled amounts look rounded?
Fractions are rounded to the nearest eighth of a unit, which matches the way measuring cups and spoons are marked. Switch to decimals if you measure by weight and want more precision.
Is my recipe uploaded anywhere?
No. Everything runs in your browser; nothing you type is sent to a server, stored, or logged.

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