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Recipe Scaler

Use this recipe scaler to resize recipes for more or fewer servings and convert each ingredient by the same multiplier.

Live calculator

Recipe scaler

Scaled amount5

Multiply each ingredient amount by the scaling factor.

Scaling factor2.5x

Target servings divided by original servings.

Amount per serving0.5

Original amount divided by original servings.

Unit conversions are planning checks. For cooking, ingredient density and rounding can change the practical result.

Formula

Recipe scaling formula

Scaled amount = ingredient amount x target servings / original servings

Use the same unit as the original ingredient amount, such as cups, tablespoons, grams, or ounces.

How to use

Steps

  1. Enter the original ingredient amount.
  2. Enter the original number of servings.
  3. Enter the target number of servings.
  4. Apply the same scaling factor to each ingredient in the recipe.

Example

Sample calculation

Original amount2 cups
Original servings4
Target servings10
Scaled amount5 cups

Calculator use

Best for

  • Converting units for cooking, travel, shipping, home projects, school work, recipes, and quick measurement checks.
  • Scaling a recipe or comparing metric and US customary measurements before cooking, shopping, or planning.

Before relying on it

Check first

  • Mixing volume and weight conversions when ingredient density changes the answer.
  • Using a rounded conversion for a task that needs precision, such as dosing, engineering, or formal lab work.
  • Scaling recipe time, pan size, salt, spices, or leavening exactly the same way as ingredient quantity.

Details

What to know before using the result

Scenario inputsingredient amount, original servings, and target servings

Keep ingredient amount and original servings aligned to the same scenario so scaled amount represents a consistent calculation.

Method checkRecipe scaling formula

The tool applies Scaled amount = ingredient amount x target servings / original servings to the entered values, then keeps scaled amount, examples, assumptions, and limits visible for review.

Benchmarks

How to read the result

0.5x: Half recipe.

Useful when cooking a smaller batch.

2x: Double recipe.

Works well for many ingredients, but seasonings may need taste checks.

3x+: Large batch.

Cooking time, pan size, and mixing method may not scale perfectly.

Calculator accuracy

Methodology and assumptions

Formula, inputs, limitations and review record
Formula

Scaled amount = ingredient amount x target servings / original servings

Inputs used

Ingredient amount, Original servings, Target servings

Limitations

Conversion pages use standard factors where possible. Cooking and recipe results are less exact when density, pan size, seasoning, or cooking method affects the outcome.

Review record

Catalog QA baseline on June 6, 2026. This date marks the catalog-wide automated and editorial QA baseline, not a tool-specific expert review.

Cite this page

Toolkit Shelf. Recipe Scaler. https://toolkitshelf.com/tools/recipe-scaler

FAQ

Common questions

How do I scale a recipe?

Divide target servings by original servings, then multiply each ingredient amount by that factor.

Can I scale spices exactly?

Use the scaled number as a starting point, but taste as you go because spices and salt may not scale perfectly.

Does cooking time scale with servings?

Not always. Larger batches can need different pans, mixing, and cook times.