Recipe scale conversion calculator

Scale ingredient quantities to a new serving count. Keep each quantity at the beginning of its line.

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Recipe scale conversion calculator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Ingredients

Original servings

Wanted servings

Your result

More options and calculation details

Use decimals, simple fractions or mixed fractions followed by the ingredient. Up to 100 ingredient lines are supported. Lines without a leading quantity must be revised before export.

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Updated 2026-09-19

How this conversion works

The serving multiplier is wanted servings ÷ original servings. Every leading ingredient quantity is multiplied by that ratio; ingredient names and units remain as entered.

Scaling preserves ingredient ratios. It does not change grams to cups, round eggs to whole eggs or assume that baking time scales with servings.

Next: Baking pan size converter

A worked example

Changing 4 servings to 6 gives a multiplier of 1.5. An ingredient listed as 2 cups becomes 3 cups; 1 1/2 cups becomes 2.25 cups.

Next: Cups to grams converter

Before you use the result

One quantity per line. Ranges, package expressions and unmeasured “to taste” lines need manual editing. Check all results, especially leavening, seasoning and indivisible ingredients. Nonzero numeric inputs for these compound calculations are limited to 1e-40 through 1e40.

Next: Cooking measurement converter

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ToolOctopus. “Recipe scale conversion calculator.” Updated 2026-09-19. https://tooloctopus.com/recipe-scale-conversion-calculator.

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