Recipe Serving Size & Ingredient Ratio Scaler
Scales recipes to target serving counts or available ingredient weights, converting between US customary (cups.
Scaled Ingredients
| Original | Scaled Quantity | Ingredient |
|---|---|---|
| 2 cups | 4 cups | all-purpose flour |
| 1 tsp | 2 tsp | baking soda |
| 1/2 tsp | 1 tsp | salt |
| 1 cup | 2 cups | unsalted butter, softened |
| 3/4 cup | 1 1/2 cups | granulated sugar |
| 3/4 cup | 1 1/2 cups | packed brown sugar |
| 2 | 4 | large eggs |
| 2 cups | 4 cups | semi-sweet chocolate chips |
About this tool
How to use it
- Enter your original recipe serving count and your desired target servings count (or use quick 0.5x, 2x, 3x buttons).
- Paste or type your ingredient list into the recipe box (fractions like '1 1/2 cups' or decimals like '2.5 oz' are automatically recognized).
- Toggle 'Display as Kitchen Fractions' to view quantities in standard culinary fractional cups and spoons.
- Review the Scaled Ingredients table showing original vs scaled amounts side-by-side.
- Click 'Copy Scaled Recipe' to copy the scaled grocery list to your clipboard.
Why it matters
Scaling recipes for dinner parties, meal prep, or baking by hand requires multiplying fractions and mixed numbers, which frequently leads to kitchen math mistakes and ruined dishes. This tool automates the calculations instantly with culinary-friendly fractions.
When to use it
Use this tool when doubling casseroles for a party, cutting a cake recipe in half for a smaller cake pan, scaling sourdough baking formulas, or converting bulk catering recipes for home cooking.
Good to know
All calculations run client-side using vanilla JavaScript. No recipes, ingredients, or personal notes are uploaded to any server.
Common questions
Can I scale ingredients like baking powder or salt 1:1?
For most staples (flour, sugar, liquids, proteins), linear scaling works perfectly. However, for baking powder, baking soda, and very spicy seasonings (chili powder, cloves), start with a 1.5x increase when doubling and adjust by taste or standard test.
Does this tool support fractional quantities like 3/4 or 1 1/2?
Yes! The parser natively accepts whole numbers, fractions (1/4, 1/3, 1/2, 3/4), and mixed fractions (1 1/2, 2 3/8) and converts them to standard kitchen measurements.
Can I scale metric units (grams, milliliters)?
Yes. Metric measurements like grams (g), kilograms (kg), and milliliters (ml) scale seamlessly with exact decimal precision.
Is my recipe data private?
Yes, 100%. The tool executes completely locally on your device. Nothing is saved or sent to any server.