Recipe Scaler

Original servings

New servings

Ingredients (one per line)

Scale factor× 1.5

Original	Scaled
2 cups all-purpose flour	3 cups all-purpose flour
1 1/2 tsp baking powder	2 ¼ tsp baking powder
3/4 cup sugar	1 ⅛ cup sugar
2 eggs	3 eggs
½ cup milk	¾ cup milk
1 tsp vanilla extract	1 ½ tsp vanilla extract

Spices, salt and leavening do not always scale linearly — adjust to taste for large changes. Baking times may also change with pan size.

Paste an ingredient list, set the original and new number of servings, and every quantity is scaled for you — with results shown as kitchen fractions like 1 ½ or ¾.

How to use the Recipe Scaler

Enter the number of servings the recipe makes.
Enter the number of servings you want.
Paste the ingredients, one per line, with the amount at the start.

How it works

The scale factor is new servings ÷ original servings. Each line’s leading quantity — whole numbers, decimals, fractions (3/4), mixed numbers (1 1/2) or symbols (½) — is multiplied by that factor and rounded to the nearest common kitchen fraction.

When scaling a lot, keep an eye on salt, spices and leavening (which may need less than a straight multiplication), and adjust pan sizes and baking times.

Frequently asked questions

How do I halve a recipe?

Set the new servings to half the original. For eggs, beat one egg and use about half of it (roughly 25 g).

Can I scale baking recipes?

Yes, but use a pan with the same depth so baking times stay similar, and weigh ingredients if you can for accuracy.

Does cooking time change when I double a recipe?

Often it does — larger roasts and deeper dishes take longer. Check doneness with a thermometer rather than the clock.