How do I scale a recipe for a different number of servings?

Divide the target servings by the original servings to get a factor, then multiply every quantity by it. Enter both numbers above and the whole ingredient list is rewritten for you.

How do I convert a recipe to a different pan size?

Compare the areas, not the dimensions. A 9 by 13 inch pan has 117 square inches against 64 for an 8-inch square, so the recipe scales by about 1.83 — the pan mode here works that out from the shapes you pick.

Does baking time change when you scale a recipe?

Yes, but not proportionally. Heat has to travel further into a deeper batter, so a doubled cake needs longer at the same temperature — check it 10 minutes before the original time and go from there.

How do I halve an egg?

Beat the egg, weigh or measure it, and use half. A large egg is about 50 grams or three and a half tablespoons out of the shell, so half is 25 grams — much more reliable than guessing.

Is my recipe uploaded anywhere?

No. The text is parsed and rewritten in your browser, so a family recipe you paste in stays on your device.

Recipe Scaler

Scale a whole recipe by servings, a multiplier or a change of pan size, with kitchen-friendly fractions.

The Recipe Scaler runs entirely in your browser. The recipe you paste is parsed and scaled on your device and never uploaded.

Open the Cooking Measurement Converter

About Recipe Scaler

Scaling a recipe is mostly a parsing problem. Each line mixes a quantity, a unit and an ingredient, and only the quantity should move — but the quantity might be 1 1/2, or ¾, or a range like 2–3, and the answer has to come back as something a measuring cup can show rather than 0.375 of a cup. This tool reads whole numbers, fractions, unicode vulgar fractions and ranges, multiplies them, and rounds to the nearest eighth. It also tidies units where that reads better, turning four tablespoons into a quarter cup, and leaves headings, instructions and metric weights alone, because 212 grams is a real measurement and three-eighths of a gram is not.

Features

Scale by servings, by a plain multiplier, or by a change of pan size
Reads whole numbers, fractions, unicode ½ and ranges like 2–3
Results rounded to the fractions on a real measuring cup
Optional unit tidying: 4 tbsp becomes ¼ cup, 6 tsp becomes 2 tbsp
Metric weights stay decimal instead of being forced into fractions
Headings and instruction lines pass through untouched
Pan area calculator for round, square and rectangular tins
A note on what scaling does not fix, such as baking time

How to use the Recipe Scaler

Paste your ingredient list, one item per line
Choose how to scale it: servings, a multiplier or a pan change
Read the scaled list and copy it out
Check the note about baking time before you put anything in the oven

Example

Input

1 1/2 cups flour
3/4 cup sugar
2 tbsp butter

Output

3 cups flour
1 ½ cups sugar
¼ cup butter

Doubled, with unit tidying on — four tablespoons of butter reads better as a quarter cup.

Common errors & troubleshooting

A line is not scaled at all. — The quantity has to come first on the line. "Flour, 2 cups" is treated as an instruction; "2 cups flour" is scaled. Headings and method steps are left alone on purpose.
Baking the scaled version comes out wrong. — Volume and time do not scale together. A doubled cake in a bigger tin takes longer but not twice as long, and a halved one browns sooner. Keep the temperature the same and test for doneness early.
Salt and spices taste overpowering when doubled. — Seasoning rarely needs the full multiple. Scale it by about three-quarters of the factor, taste, and adjust — the tool scales it literally so you can see the starting point.

Frequently asked questions

How do I scale a recipe for a different number of servings?: Divide the target servings by the original servings to get a factor, then multiply every quantity by it. Enter both numbers above and the whole ingredient list is rewritten for you.
How do I convert a recipe to a different pan size?: Compare the areas, not the dimensions. A 9 by 13 inch pan has 117 square inches against 64 for an 8-inch square, so the recipe scales by about 1.83 — the pan mode here works that out from the shapes you pick.
Does baking time change when you scale a recipe?: Yes, but not proportionally. Heat has to travel further into a deeper batter, so a doubled cake needs longer at the same temperature — check it 10 minutes before the original time and go from there.
How do I halve an egg?: Beat the egg, weigh or measure it, and use half. A large egg is about 50 grams or three and a half tablespoons out of the shell, so half is 25 grams — much more reliable than guessing.
Is my recipe uploaded anywhere?: No. The text is parsed and rewritten in your browser, so a family recipe you paste in stays on your device.

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