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Recipe Serving Size Adjuster

Scale any recipe to any number of servings.

Free tool scales recipe quantities for different serving sizes. Automatically adjusts ingredients and cooking times. Handles fractions and provides shopping lists for any serving size.

⏱ ~20 secCulinary scaling principlesRecipe & Cooking
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Linear scaling
Most ingredients
0.75×
Spice scaling
Conservative
+25%
Time for 2× batch
Adjustment
Area
Pan size scales
Not linear
STEP 01

Original servings.
Target servings.

Paste ingredients one per line. We handle fractions, decimals, and mixed numbers.

Format: amount unit ingredient (e.g., "2 cups flour").
Updates live as you type
Scale factor
2.00×
48 servings
2 cups flour
4 cups flour
1/2 cup sugar
1 cup sugar
3 eggs
6 eggs
1 teaspoon vanilla
2 teaspoon vanilla
Under the hood

Linear math, honest warnings.

Most ingredients scale linearly with the desired-to-original serving ratio. Spices, leavening, and cook time follow culinary scaling rules used in professional kitchens.

  1. 01

    Scale factor

    Desired servings ÷ original servings. We multiply each parsed ingredient amount by this factor.

  2. 02

    Fraction recognition

    0.25 → 1/4, 0.33 → 1/3, 0.5 → 1/2, 0.67 → 2/3, 0.75 → 3/4. Mixed numbers like "1 1/2" parse correctly.

  3. 03

    Real-cooking caveats

    Scale spices conservatively (~75%), add ~25% time for doubled batches, and scale pan size by area, not linear inches.

Questions

Frequently asked

No. Most ingredients scale linearly, but spices, salt, and garlic scale at 75% rate when doubling. Alcohol and extracts scale at 85%. Leavening agents in baking require special formulas for proper rise. The calculator handles these automatically.
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