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Recipe Scaling Calculator

Scale any ingredient up or down for a different number of servings.

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Rex says

Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.

Try a scenario

Click to load — tweak from there.

Inputs

Result

Scaled ingredient amount

6.25

Multiply everything by

2.500

Amount per serving

0.625

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How to use this

  1. 1Enter original servings.
  2. 2Enter servings you need.
  3. 3Enter ingredient amount in the recipe.
  4. 4Read your scaled ingredient amount on the right — it updates as you type.
  5. 5Hit Share to keep the scenario or send it to someone.

About this calculator

Recipes are written for whoever wrote them, not for your table. Enter the original servings, the servings you actually need, and the amount of any single ingredient to get the scaled quantity plus the multiplier you can apply to everything else.

FormulaScaled amount = original amount × (target servings ÷ original servings).

Worked example

Using the values the calculator loads with:

Inputs

  • Original servings: 4
  • Servings you need: 10
  • Ingredient amount in the recipe: 2.5

Results

  • Scaled ingredient amount: 6.25
  • Multiply everything by: 2.5
  • Amount per serving: 0.625

What each field means

Inputs

Original servings
The original servings used in the calculation. Starts at 4 so you have a working example on load.
Servings you need
The servings you need used in the calculation. Starts at 10 so you have a working example on load.
Ingredient amount in the recipe
The ingredient amount in the recipe used in the calculation. Starts at 2.5 so you have a working example on load.

Results

Scaled ingredient amount
Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Multiply everything by
Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Amount per serving
Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.

FAQ

Do cook times scale too?

No. Volume scales linearly, heat transfer does not. Doubling a casserole usually adds 20–40% to the bake time, not 100%.

Does this work for baking?

For most ingredients yes, but leaveners and salt often scale slightly under-proportionally at large multiples. Scale them, then taste and adjust.

Accuracy and limitations

  • Estimates assume standard, average conditions — local rules, pricing, and materials vary.
  • Results are rounded for readability; add a buffer before ordering, booking, or committing.
  • Double-check anything with a real cost attached against a local quote.

Cite this calculator

Writing about this topic? Grab a citation — every link helps keep these tools free.

APA
RevenueLab. (2026). Recipe Scaling Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/recipe-scaler
HTML
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/recipe-scaler" target="_blank" rel="noopener">Recipe Scaling Calculator — RevenueLab</a> (2026).</p>
Markdown
Source: [Recipe Scaling Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/recipe-scaler) (2026).
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