This culinary math tool recalculates recipe ingredient proportions when scaling batch sizes up or down. Whether doubling a cookie recipe for a school bake sale or scaling down a dinner entree from four servings to two, this calculator determines the exact linear multiplier to resize every ingredient accurately.

### Scaling Methodology and Multiplier Formula The calculator evaluates proportional yield ratios directly in client state:

$$\text{Scaling Multiplier} = \frac{\text{Desired Servings to Make}}{\text{Original Recipe Servings}}$$

- **Multiplier > 1.0:** Recipe is scaled up (batch size expansion). - **Multiplier < 1.0:** Recipe is scaled down (fractional batch reduction). - **Application:** Multiply each volume (cups, tablespoons, grams) by the multiplier.

### Worked Numeric Example Suppose a home baker prepares chocolate chip cookies using a recipe yielding 4 servings (12 cookies) that calls for 2 cups of flour, 0.75 cups of brown sugar, and 1 teaspoon of baking soda, but wants to produce 10 servings (30 cookies):

- **Original Servings:** 4 - **Desired Servings:** 10

**Step-by-Step Calculation:** 1. **Scaling Multiplier:** $10 / 4 = 2.50\times$. 2. **Flour Adjustment:** $2\text{ cups} \times 2.50 = 5.0\text{ cups}$. 3. **Brown Sugar Adjustment:** $0.75\text{ cups} \times 2.50 = 1.875\text{ cups}$ (1 cup + 7 tablespoons). 4. **Baking Soda Adjustment:** $1\text{ tsp} \times 2.50 = 2.50\text{ teaspoons}$.

### Client-Side Processing Note All calculations run in client-side JavaScript. No recipe names, serving numbers, or ingredient notes are transmitted across any network.