Recipe Scaler Calculator
The Recipe Scaler changes ingredient quantities when the number of servings needs to increase or decrease. It provides a single scaling factor and optional adjusted quantities for up to four ingredient amounts.
How to use this calculator
- Enter the number of servings in the original recipe.
- Enter the target number of servings.
- Optionally enter up to four original ingredient quantities.
- Multiply each ingredient amount by the displayed scaling factor and preserve its original unit.
Recipe scaling formula
Scaling factor = target servings ÷ original servings; adjusted ingredient = original ingredient × scaling factor.
- A scale factor of 2 doubles the quantities, while a scale factor of 0.5 halves them.
- Some cooking variables, including seasoning, cooking time, pan dimensions, and food safety, may not scale linearly.
Worked examples
Make more servings
A recipe serves 4 and needs to serve 6. An ingredient originally uses 200 g.
6 ÷ 4 = 1.5; 200 g × 1.5 = 300 g.
Use 300 g of that ingredient as a linear starting point.
Understanding the result
Keep the unit associated with each ingredient consistent.
The calculator scales quantities mathematically; it does not adjust a recipe’s cooking method or guarantee the same result.
Important notes
Use the same ingredient units as the original recipe.
Recheck seasoning, equipment size, and cooking instructions when changing batch size substantially.
Frequently asked questions
How do I double a recipe?
Set target servings to twice the original servings; the scaling factor will be 2.
Should cooking time also be multiplied by the factor?
Not automatically. Cooking time depends on equipment, depth, temperature, and the recipe rather than servings alone.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
- How to Calculate Percentage Change — Learn the percentage change formula, how to calculate increases and decreases, and why the original value matters.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.