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Recipe Scaler — Scale Any Recipe Up or Down

~30 seconds

Enter the original and target servings, then list your ingredients with their amounts. The calculator applies the scale factor to every ingredient and shows the adjusted amounts. Units are preserved exactly — no density conversions are invented.

Ingredient
Amount
Unit
Ingredient
Amount
Unit

What this calculator determines

It calculates a scale factor from your original and target servings and applies that factor to every ingredient amount while preserving the units you entered.

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Examples

Scale 4 servings to 6

4 → 6 servings; 2 cups flour, 1 tsp salt, 0.5 cup milk

Calculation

  1. Factor = 6 ÷ 4 = 1.5
  2. 2 cups flour × 1.5 = 3 cups
  3. 1 tsp salt × 1.5 = 1.5 tsp
  4. 0.5 cup milk × 1.5 = 0.75 cup

Factor 1.5× — 3 cups flour, 1.5 tsp salt, 0.75 cup milk

Halve a recipe (8 → 2)

8 → 2 servings; 4 eggs, 1 cup sugar

Calculation

  1. Factor = 2 ÷ 8 = 0.25
  2. 4 eggs × 0.25 = 1 egg
  3. 1 cup sugar × 0.25 = 0.25 cup

Factor 0.25× — 1 egg, 0.25 cup sugar

Assumptions & Conventions

Linear scaling
Ingredient amounts are multiplied by the same scale factor: target servings ÷ original servings.
Units preserved
Units remain exactly as entered; the calculator does not invent density or weight conversions.
Seasonings and large baking scales
Spices and salt may not scale linearly; taste and adjust as needed. Large baking scale factors may require non-linear adjustment for leavening agents and liquids.Source: Existing FAQ

Frequently asked questions