The calculation, without hidden assumptions
The arithmetic in recipe scaling is one ratio, but the annoying part is applying it to every ingredient while preserving readable kitchen quantities. Paste one ingredient per line with the amount first, choose the old and new yield, and this calculator rescales recognized decimals, simple fractions, mixed numbers and common Unicode fractions. Lines without a recognized leading quantity stay visible instead of being silently dropped.
How to use this calculator
Enter the servings or batch yield of the original recipe and your target yield.
Paste one ingredient per line, beginning measurable lines with an amount such as 2, 0.75, 3/4, 1 1/2 or ½.
Review the scaled table and separately adjust pan size, technique, cooking time or food-safety steps where the recipe requires it.
Where people use it
- •Halving a family recipe
- •Scaling a restaurant prep batch
- •Converting a recipe written for four servings to a different head count
Example: four servings to ten
The scale factor is 10 ÷ 4 = 2.5. A line starting with “1 1/2 cups flour” becomes 3.75 cups, displayed as 3 3/4 cups; the ingredient wording after the amount is preserved.
What the result does not assume
- •Cooking time, oven temperature, pan depth, seasoning, leavening behavior and food-safety requirements do not necessarily scale in direct proportion to ingredient quantities.
- •Unit conversion is intentionally separate because converting volume to weight can require ingredient-specific density.
Frequently asked questions
Can I paste fractions such as 1 1/2 or ¾?+
Yes. The parser recognizes common decimals, simple fractions, mixed numbers and common Unicode fraction symbols when they appear at the start of a line.
Will the calculator change cups to grams?+
No. Scaling and unit conversion are separate jobs; mass-volume conversion may depend on the ingredient.
Should I multiply cooking time by the same factor?+
Usually not. Cooking time and pan behavior depend on geometry, equipment and the food itself, so review the recipe method separately.
Semantic next steps
Continue the calculation
These links move to a different input, formula or project stage rather than a keyword variation of this page.
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