Recipe scaler
Use the recipe scaler to convert any recipe to a new number of servings: paste the ingredients, enter the servings, done. For 6 instead of 4 servings, 1 1/2 cups of flour become 2.25 cups – every line at once, including fractions like 1/2.
Source: Wikipedia – Dreisatz (Verhältnisrechnung). Updated: .
How it is calculated
Scaling a recipe means multiplying every amount by the same factor: the servings you want divided by the servings in the recipe. For 6 instead of 4 servings the factor is 6 ÷ 4 = 1.5; 200 g flour becomes 300 g and 3 eggs become 4.5 eggs.
How to scale a recipe
- Find the factor: servings wanted ÷ servings in the recipe.
- Multiply every amount: grams, millilitres, spoons and counts alike.
- Round sensibly: large amounts to whole numbers, small ones to tenths or hundredths.
- Adjust the pan: the area must grow with the factor, so the diameter grows with √factor.
What does not scale linearly
Salt and hot spices, baking powder and yeast, liquid for braising and cooking times follow the factor only roughly. With a factor above 2, season carefully and go by doneness tests rather than the clock. Half an egg can be approximated with beaten egg (about 25 g).
Frequently asked questions
How do you scale a recipe to more servings?
Divide the servings you want by the servings in the recipe and multiply every ingredient by that factor. For 6 instead of 4 servings the factor is 1.5.
How do you halve a recipe?
Enter half the servings; the factor becomes 0.5. Eggs and baking powder are hard to divide; halve a beaten egg by weight.
Does the factor apply to spices and salt?
Only roughly. Start with about 70 to 80 percent of the calculated amount and taste; you can add more but not take it out.
How does baking time change?
It grows less than the quantity. Use a skewer test or core temperature rather than the clock; a larger, shallower pan often bakes faster than a small, deep one.
Which amount formats does the tool understand?
Decimals with a comma or point, fractions like 1/2, mixed numbers like 1 1/2, characters like ½ and ranges like 2–3.
Sources and legal basis
- Wikipedia – Dreisatz (Verhältnisrechnung)
- BZfE – Maße und Gewichte in der Küche (measures and weights in the kitchen)
- USDA – Measuring Food (Küchenmaße)
- Wikipedia – Cooking weights and measures
As of: · Editorial policy
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