OmniCalcsRecipe Scaler
Scale any recipe up or down in seconds — from 2 servings to 20, or by any factor you like.
How to Use This Scaler
Paste your ingredient list with one ingredient per line, then enter the original and desired number of servings. Each line is scaled by the same factor.
- Supports whole numbers, decimals (0.75) and mixed fractions (1 1/2).
- Units like cups, grams, teaspoons and eggs are preserved as written.
- Halving or doubling uses the same factor, so baking chemistry stays intact.
Frequently Asked Questions
How is the scale factor calculated?
The factor is desired servings divided by original servings. A recipe for 4 scaled to 8 multiplies every ingredient by 2.
What happens with 1/3 or awkward fractions?
The tool computes exact decimal values and rounds to a practical precision, so 1/3 cup becomes 0.33 cup when needed.
Should eggs and leaveners scale the same way?
For simple scaling yes, but very large batches may need slightly less baking powder or yeast — chemistry is not perfectly linear.
Can I scale by a custom factor?
Yes — enter any two serving numbers, e.g. 3 servings to 5, and every ingredient scales by 5/3.
Practical Example
Doubling a cookie recipe from 4 servings to 8 servings (factor = 8 ÷ 4 = 2):
- 2 cups flour → 4 cups
- 1 1/2 cups sugar → 3 cups
- 3 large eggs → 6 large eggs
- 1/2 cup butter → 1 cup
What Your Results Mean
- Scale factor — the single multiplier applied to every ingredient.
- Scaled amount — the new quantity for each line, kept in the same unit as the original.
- Practical rounding — amounts are rounded to make them usable with standard measuring cups and spoons.