Five servings from a recipe for four is a factor of 1.25, and the awkwardness is entirely in the measuring. A quarter more of everything turns 2 cups into 2½ cleanly and turns ¾ teaspoon into fifteen sixteenths, which is not a measurement anyone owns a spoon for. For savoury cooking, round the smal...
Baking adjustment
Leavening adjustment applies when scaling above 2×
SCALE FACTOR
1.25×
4 → 5 servings ▲ scale up
SERVINGS
● Original (4) ● Added (1)
SCALE FACTOR
1.25×
MULTIPLY EACH BY
×1.25
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.
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
COMMON MEASUREMENT EQUIVALENTS
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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