Recipe Scaler

Multiply or divide recipe ingredient amounts for a different number of servings.

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What This Calculator Does

Multiply or divide recipe ingredient amounts for a different number of servings.

It combines Original Servings, Desired Servings, Ingredient Amount to estimate Scaled Amount, Scale Factor, Original Amount.

Formula & Method

Recipe scaling uses

Scale = \frac{S_d}{S_o}

and

Amount_{scaled} = Amount_{original}\cdot Scale

where

S_o

and

S_d

are original and desired servings.

Notation used in the formulas: $R$ = Scaled Amount; $x_{1}$ = Original Servings; $x_{2}$ = Desired Servings; $x_{3}$ = Ingredient Amount.

Method summary: inputs are normalized to consistent units, core equations are evaluated, then secondary values are derived and rounded for display.

Use this calculator for quick scenario analysis. Start with baseline values, change one driver at a time, and compare how sensitive the results are to each input shown above.

Reference Book

KitchenWise

Essential Food Science for Home Cooks

Shirley O. Corriher · Scribner

A food-science reference for kitchen technique, conversions, cooking behavior, and practical recipe adjustments.

View Book

Inputs Used

Original Servings: Used directly in the calculation.
Desired Servings: Used directly in the calculation.
Ingredient Amount: Amount of one ingredient in original recipe

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