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Recipe Scaler

Double, halve or rescale a recipe for any number of servings — fractions included.

One per line, with the amount first.

Scale by

Scaled recipe

× 1.5 — 5 amounts changed

  • 3 cups flour
  • 2¼ tsp baking powder
  • ¾ cup sugar
  • 3 eggs
  • 300 g butter
  • Pinch of salt

Runs in your browser — nothing you enter is sent to a server.

How the Recipe Scaler works

Paste your ingredient list, one ingredient per line with the amount first, and choose the servings you have and want — or a multiplier. The scaler multiplies the amount at the start of each line, understands fractions (1 1/2, ½), decimals and ranges (2–3), and writes results as kitchen fractions where it can. Lines without an amount, like “salt to taste”, stay as they are.

Formula

new amount = amount × (servings wanted ÷ servings in the recipe)

Examples

From 4 servings to 6

The factor is 1.5: 2 cups flour becomes 3 cups, 1 1/2 tsp baking powder becomes 2¼ tsp, and ½ cup sugar becomes ¾ cup.

Halving a recipe

Use a multiplier of 0.5: 1 egg becomes ½ egg — beat it and use half by weight.

Frequently asked questions

Does baking time change?

Often a little — larger batches in bigger pans may need longer. The Baking Pan Size Converter helps choose a pan.

What about spices and yeast?

Scale them, then taste: strong flavours and leavening don't always need the full multiple for big batches.

Can it convert units?

It keeps your units. Use the Cooking Measurement Converter to turn cups into grams.

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