食谱份量缩放计算器
在数秒内将任意食谱按比例放大或缩小。输入原始份量和目标份量，添加配料，计算器将计算每种配料的缩放用量——以易于测量的分数形式显示，如 ½、¼ 和 ⅓。
Recipe Scaler
Enter your recipe's original servings and desired servings, then add your ingredients to scale them instantly.
Presets multiply the original servings count.
Frequently Asked Questions
食谱缩放计算器是如何工作的？
食谱缩放计算器将每种食材的用量按相同比例缩放。输入原始份数和目标份数，计算器自动计算缩放比例（目标份数/原始份数），并将每种食材的用量乘以该比例。
缩放食谱时有什么需要注意的？
并非所有食材都可以线性缩放：①烘焙粉、盐、香料——减少约 25-30%（缩放时味道会更浓）；②发酵剂（酵母、泡打粉）——不能完全线性缩放；③烹饪时间——通常随批次增大而延长，但并非简单倍增；④锅具尺寸——可能需要调整。
如何将英制单位（杯、汤匙）转换为公制单位？
常用换算：1 杯 = 240 mL；1 汤匙 = 15 mL；1 茶匙 = 5 mL；1 液量盎司 = 30 mL；1 磅 = 454 g；1 盎司 = 28.35 g。本计算器支持在缩放的同时进行单位换算。
烘焙食谱缩放有什么特殊要求？
烘焙比烹饪对精度要求更高，是精确的化学反应过程。大规模缩放（超过 3-4 倍）时，建议使用重量（g 或 oz）而非体积（杯、汤匙），并进行少量试做以验证效果，因为大批量烘焙可能需要调整烤箱温度和时间。
How to Scale a Recipe
How to Use This Calculator
Scaling a recipe is straightforward with this tool. Follow these steps:
- Enter the original number of servings your recipe yields.
- Enter the desired number of servings you want to make.
- Use the quick scale presets (½×, 2×, 3×) to set the desired servings automatically.
- Add each ingredient with its name, amount, and unit.
- Click "Scale Recipe" to see the scaled ingredient list with fraction-friendly amounts.
- Use the Copy button to copy the scaled list to your clipboard.
The Scaling Formula
Recipe scaling uses a simple proportional formula. All ingredient amounts are multiplied by a scale factor:
Scale Factor = Desired Servings ÷ Original Servings
Scaled Amount = Original Amount × Scale Factor
For example, if your recipe serves 4 and you want to serve 10:
Scale Factor = 10 ÷ 4 = 2.5
2 cups flour × 2.5 = 5 cups flour
3 eggs × 2.5 = 7.5 eggs (round to 8 for practical use)
This calculator expresses amounts as fractions (e.g., ½, ¼, ⅓) wherever possible for easier measuring.
Common Scaling Ratios
These are the most common recipe scaling scenarios and their corresponding scale factors:
| Scenario | Original → Desired | Scale Factor |
|---|---|---|
| Halve a recipe | 4 → 2 | ×0.5 |
| Double a recipe | 4 → 8 | ×2 |
| Triple a recipe | 4 → 12 | ×3 |
| Scale for a party (6 → 24) | 6 → 24 | ×4 |
| Individual portion from family recipe | 6 → 1 | ×0.167 |
| Meal prep (2 → 10) | 2 → 10 | ×5 |
Measurement Conversion Tips
When scaling results in unusual amounts, use these common measurement equivalencies to simplify measuring:
| Scaled Amount | Practical Equivalent |
|---|---|
| 3 tsp | = 1 tbsp |
| 4 tbsp | = ¼ cup |
| 8 tbsp | = ½ cup |
| 16 tbsp | = 1 cup |
| 2 cups | = 1 pint |
| 4 cups | = 1 quart |
Tip: For fractional eggs (e.g., 1.5 eggs), beat the eggs together and use half the mixture. For small fractions of eggs, one extra egg is usually fine for most recipes.
Baking vs. Cooking Scaling
Scaling behaves differently for cooking and baking. Understanding the difference helps you get better results:
Cooking (Flexible)
- Most ingredients scale linearly
- Salt and spices: scale by 75% when doubling
- Cook time increases slightly for larger volumes
- Pan size should be adjusted accordingly
Baking (Precise)
- Flour, sugar, fat scale proportionally
- Leaveners (baking soda/powder): scale at 75%
- Salt and vanilla: scale at 75%
- Oven temperature stays the same; adjust time
Leavening Agent Rule of Thumb
When scaling baking recipes, reduce leavening agents (baking powder, baking soda, yeast) slightly relative to the scale factor. For a 2× recipe, use 1.5–1.75× leavening rather than exactly 2×. Too much leavening causes overflow and bitter taste; too little results in a dense texture.
Worked Examples
Example 1: Doubling a Chocolate Chip Cookie Recipe
Original: 24 cookies. Desired: 48 cookies. Scale factor: 2×
| Ingredient | Original | Scaled (2×) |
|---|---|---|
| All-purpose flour | 2¼ cups | 4½ cups |
| Butter | 1 cup | 2 cups |
| Sugar | ¾ cup | 1½ cups |
| Eggs | 2 | 4 |
| Baking soda | 1 tsp | 1¾ tsp (not 2) |
Example 2: Scaling Pasta Sauce from 4 to 10 Servings
Scale factor: 10 ÷ 4 = 2.5×
| Ingredient | Original | Scaled (2.5×) |
|---|---|---|
| Tomatoes | 2 cans | 5 cans |
| Olive oil | 2 tbsp | 5 tbsp |
| Garlic cloves | 4 | 10 |
| Salt | 1 tsp | ~2 tsp (taste) |