Recipe Scaler Calculator Formula
Understand the math behind the recipe scaler calculator. Each variable explained with a worked example.
Formulas Used
Scaled Ingredient Amount
scaled_amount = ingredient_amount * scale_factorScale Factor
multiplier = scale_factorVariables
| Variable | Description | Default |
|---|---|---|
original_servings | Original Recipe Servings | 4 |
desired_servings | Desired Servings | 10 |
ingredient_amount | Ingredient Amount | 2 |
scale_factor | Derived value= desired_servings / original_servings | calculated |
How It Works
How to Scale a Recipe
Divide the desired servings by the original servings to get a multiplier. Apply it to every ingredient.
Formula
Scale Factor = Desired Servings / Original Servings
Scaled Amount = Original Amount x Scale Factor
Worked Example
A recipe serves 4 and calls for 2 cups of flour. You need 10 servings.
- 01Scale factor = 10 / 4 = 2.5
- 02Scaled flour = 2 x 2.5 = 5.0 cups
Frequently Asked Questions
Do all ingredients scale linearly?
Most do, but spices, leavening agents, and salt should be scaled more conservatively. Start with 1.5x the multiplier for spices and adjust to taste.
Does cooking time change when scaling?
Larger batches may need slightly more cooking time due to increased volume, but not proportionally. Use a thermometer to check doneness.
Can I scale baking recipes?
Baking is more sensitive to ratios. Scale flour, sugar, and butter proportionally, but be careful with leavening (baking powder/soda) and eggs.
Ready to run the numbers?
Open Recipe Scaler Calculator