Recipe Scaler

Scale ingredient quantities up or down for any number of servings.

Recipe serves	4
I want to serve	10
Ingredients (amount, unit, name)	2 cups flour 0.5 cup sugar 2 eggs 250 ml milk

Recipe serves

I want to serve

Ingredients (amount, unit, name)

Scale factor

× 2.5

From 4 to 10 servings. Eggs: round to whole eggs or beat and measure by weight (about 50 g each without shell).

Scaled ingredients

Original	Scaled
2 cups flour	5 cups flour
0.5 cup sugar	1¼ cup sugar
2 eggs	5 eggs
250 ml milk	625 ml milk

About the Recipe Scaler

Enter how many the recipe serves and how many you want to serve, then paste the ingredients, one per line with the amount first (“2 cups flour”). The calculator multiplies every amount and shows kitchen-friendly fractions such as 3¾ tsp.

Weights scale more accurately than cups and spoons. Leavening, salt and spices can taste strong when scaled up a lot, and cooking times change with pan size and depth rather than quantity.

The formula

New amount = amount × (new servings ÷ original servings)

Worked example

A recipe for 4 made for 10

Scale factor: 10 ÷ 4 = 2.5
2 cups flour → 5 cups; 1.5 tsp baking powder → 3¾ tsp
0.5 cup sugar → 1¼ cups; 250 ml milk → 625 ml; 2 eggs → 5 eggs

Questions people ask

Do baking times scale?

Not linearly; larger or deeper pans need longer at the same temperature, so check doneness.

How do I halve one egg?

Beat it and use about 25 g.

Can I enter fractions?

Yes: 1/2, 3/4 or mixed numbers like 1 1/2 all work.