Ten servings from a recipe for four is two and a half times, and it is the first scaling on this list where the leavening correction actually fires. Baking powder and bicarbonate come down by about a fifth, because they stop keeping pace with quantity somewhere around double and a straight multiplic...
Baking adjustment
Leavening reduced 20% — avoids over-rising at large batches
SCALE FACTOR
2.5×
4 → 10 servings ▲ scale up
SERVINGS
● Original (4) ● Added (6)
SCALE FACTOR
2.5×
MULTIPLY EACH BY
×2.5
Check the original serving count. This page starts from 4; if your recipe says something else, change it and every amount below recalculates.
Enter your ingredients with their quantities and units. Mark baking powder and bicarbonate as leavening so they are adjusted rather than simply multiplied.
Read the scaled column. Amounts are shown as the nearest measurable fraction, with raising agents already reduced by about a fifth.
Plan the pan before you start. Depth governs cooking time far more than quantity does, and the time never follows the same multiplier as the ingredients.
Chocolate Chip Cookies: 4 servings → 12 servings (3× scale)
| Ingredient | Original (4 servings) | Scaled (12 servings) | Adjusted (baking) |
|---|---|---|---|
| All-purpose flour | 2¼ cups | 6¾ cups | 6¾ cups |
| Butter | 1 cup | 3 cups | 3 cups |
| Granulated sugar | ¾ cup | 2¼ cups | 2¼ cups |
| Brown sugar | ¾ cup | 2¼ cups | 2¼ cups |
| Eggs | 2 | 6 | 6 |
| Vanilla extract | 1 tsp | 3 tsp | 3 tsp |
| Baking soda | 1 tsp | 3 tsp | 2.4 tsp ⚡ |
| Salt | 1 tsp | 3 tsp | 3 tsp |
| Chocolate chips | 2 cups | 6 cups | 6 cups |
⚡ Baking soda adjusted: 3 tsp × 80% = 2.4 tsp. At 3× scale, full-linear leavening causes over-rise and bitter taste. Formula: Scaled × 0.80 when factor > 2×.
CORE FORMULA
Scaled = Original × (New ÷ Original servings)
Scale factor = New servings ÷ Original servings
BAKING ADJUSTMENT RULES
Flour, butter, sugar, eggs
Scale exactly — no adjustment
Baking powder / baking soda
Use 75–80% of scaled amount (at 3×+)
Salt
Use 80–85% of scaled amount (at 3×+)
Spices & herbs
Start at 75%, taste and adjust
Oven temperature
NEVER change — always stays the same
Cooking time
Check 10–15% earlier for smaller pans
Liquids in soups/stews
May need 10–15% less at large scale
Yeast
Use same amount (not linear) for up to 2× batch
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Recipe Scaler · Scaled = Original × (New ÷ Original servings) · Baking adjustment for leavening at 3×+ · For best results, weigh ingredients with a kitchen scale