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Food & Dining calculator

Recipe Scaling Calculator

Adjust ingredient quantities for a different number of servings without changing the units you entered.

Free · Private · Runs in your browser
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  • Food & Dining Calculator

Food & Dining calculator

Scale ingredient quantities

Enter the original yield, target yield, and up to 20 ingredient quantities.

Ingredients

Quantities accept whole numbers, decimals, simple fractions, and mixed numbers such as 1 1/2. Units are kept exactly as entered.

This scales entered quantities only. It does not convert units or decide cooking time, temperature, pan size, or ingredient substitutions.

The scaled ingredient list will appear here.

Calculation method

Each quantity is multiplied by desired servings ÷ original servings. Culinary education materials describe this as a conversion-factor method; see the adjacent explanation from Auguste Escoffier School of Culinary Arts.

The engine stores the serving ratio and ingredient quantities as reduced fractions, so values such as 3/4 scaled by 1/2 return exactly 3/8.

What the result does not decide

  • Units stay exactly as entered. The calculator does not guess ingredient density or convert volume to weight.
  • Cooking time, temperature, equipment capacity, and seasoning may not change in a simple linear ratio. Nebraska Extension recommends care when reducing recipes and gives practical measurement guidance in its recipe-reduction guide.
  • Use a tested recipe and verify doneness and safe temperatures separately. FoodSafety.gov publishes safe minimum internal-temperature guidance.

Privacy and version

Inputs remain in your browser. Calculation version 1.0.0; deterministic fixtures last verified 2026-08-25.

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