Recipe Serving Size Calculator
Instantly scale your favorite recipes up or down for any number of guests. Enter your recipe ingredients list and original/desired servings to auto-calculate new quantities, keeping every ratio perfectly balanced. Designed for home cooks, bakers, chefs, meal preppers, and professionals alike!
How to Use
- Enter the original number of servings and your desired number of servings below.
- Input each ingredient with its amount and unit/name (e.g., 300 grams flour, 2 eggs, 0.5 tbsp vanilla).
- Click Calculate to see the new ingredient list for your target servings, with a summary table.
Serving Size Scaling Formula
The scaling factor, \( S \), is:
\[ S = \frac{\text{Desired Servings}}{\text{Original Servings}} \]
Scale each ingredient:
\[ \text{New Amount} = \text{Original Amount} \times S \]
Sample Scaling Calculations
| Original Servings | Desired Servings | Ingredient | Original Amount | New Amount |
|---|---|---|---|---|
| 4 | 6 | Sugar | 100 grams | 150 grams |
| 2 | 8 | Milk | 250 ml | 1,000 ml |
| 8 | 4 | Butter | 200 grams | 100 grams |
Conversion Tips & Chef Advice
- Ingredient amounts convert proportionally to servings (see the formula above).
- Round egg or yeast amounts as needed—you can’t always use a fraction of an egg!
- Oven time may vary slightly for much larger or smaller batches; check before removing dishes.
- Use kitchen scales and measuring spoons for the best accuracy when scaling up or down.
- If the recipe includes whole items (eggs, onions, etc.), round sensibly or adjust for taste.
Disclaimer: This calculator helps with common recipe scaling. For professional catering, scientific baking, or food safety, always double-check adjusted ingredient amounts and cooking techniques.