Recipe Scaler

Scale any recipe up or down by servings. Type in your ingredients and see every amount multiplied, with the units kept as you wrote them.

Reviewed by Dany, RightSums team · Updated

Runs in your browser. Free, no sign-up.

lifestyle · Daily life · UK & US

Enter the number of servings a recipe makes and the number you want to make. The scaler divides the new servings by the original to get a multiplier, then applies it to every ingredient in the table. Type your own ingredients, amounts and units, add as many rows as you need, or start a new recipe from scratch. A sample pancake-style recipe is loaded to show how it works. Scaled amounts of 10 or more are rounded to whole numbers and smaller amounts to one decimal place. Units stay as written, so grams stay grams and tablespoons stay tablespoons.

Accepted inputs

  • Original servings
  • Target servings
  • Ingredients, amounts and units

Outputs

  • Scale multiplier
  • Scaled amounts for the sample ingredient list

How to use the Recipe Scaler

  1. Enter how many servings the original recipe makes and how many you want to cook.
  2. Type your ingredients, amounts and units into the table, adding a row for each one.
  3. The scaler divides the target servings by the original to get the multiplier, such as 1.5× for 4 to 6.
  4. Read the scaled amount next to each ingredient and cook with those figures.

Frequently asked questions

How do I scale a recipe up?

Divide the servings you want by the servings the recipe makes, then multiply every ingredient by that number. Going from 4 to 6 servings is 6 ÷ 4 = 1.5, so 250g of flour becomes 375g and 2 tablespoons of sugar becomes 3.

How do I halve a recipe?

Use a multiplier of 0.5 by setting the target to half the original servings, such as 4 to 2. 300ml of milk becomes 150ml and 50g of butter becomes 25g. With 3 eggs you need 1.5, so beat 2 eggs and use three quarters of the mixture.

Can I enter my own ingredients?

Yes. Edit the names, amounts and units in the table, press Add ingredient for extra rows, or Start a new recipe to clear the sample. For 4 to 10 servings the multiplier is 2.5, so 200g of flour becomes 500g and 2 tbsp of oil becomes 5 tbsp.

How are scaled amounts rounded?

Amounts of 10 or more are rounded to the nearest whole number, and smaller amounts to one decimal place. So 3 eggs scaled by 1.5 shows as 4.5, and 250g scaled by 1.5 shows as 375. Whole numbers show without decimals.

Do cooking times change when I scale a recipe?

Often, but not in a straight line, and this tool does not adjust them. A bigger batch in a larger tin or deeper dish usually needs longer, so start checking at the original time and test that it is cooked through. The scaler covers ingredient amounts only.

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