Scale factor for 4→8 servings?
×2 — double every ingredient.
Recipe scaling is **new servings ÷ original servings** applied to every ingredient.
**Formula:**
Scale factor = New servings ÷ Original servings
Scaled amount = Original amount × Scale factor
**Example — 4 → 8 servings, 2 cups flour:**
8 ÷ 4 = **×2** → **4 cups flour**
Concise answers for common searches — definitions, steps, and comparisons.
×2 — double every ingredient.
Ratio of new to original servings applied uniformly to ingredients.
Formula
scale_factor = new_servings / original_servings; scaled = amount × scale_factorThe serving count on the recipe card (e.g. 4).
How many you need to feed (e.g. 8).
Enter one amount to see the converted value.
Multiply each line item by the scale factor.
Use the Cups to Grams Calculator for weight baking.
Input
Double recipeOutput
×2 · 4 cups8÷4=2; 2×2=4 cups.
Input
HalveOutput
×0.54÷8=0.5.
Input
TripleOutput
×312÷4=3.
Input
1.5× batchOutput
×1.59÷6=1.5.
Common real-world scenarios where this tool saves time.
4 → 8 servings, ×2 on all ingredients.
8 → 4 servings, ×0.5 factor.
4 → 10 servings, ×2.5 factor.
Step-by-step chains that connect related tools for common tasks.
| Change | Factor |
|---|---|
| Double (4→8) | ×2 |
| Halve (8→4) | ×0.5 |
| Triple (4→12) | ×3 |
Grams scale linearly; cup compaction varies.
Copy results link to share scaled recipe with family.
Every ingredient uses the **same** scale factor.
More batter may need a larger pan — use Cake Pan Converter.
Convert to grams with Baking Conversion for accuracy.
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Set new servings to twice original (4→8). Scale factor is ×2 — multiply every ingredient by 2.
New servings = half of original. Scale factor ×0.5.
Yes for servings, but pan size and leavening may need adjustment. Use Cake Pan Converter for different tins.
Most home cooks scale spices linearly; reduce slightly if doubling very spicy dishes.
Scaler changes serving amounts; Cups to Grams converts volume to weight by ingredient density.
Factor = 6÷4 = 1.5. Multiply each ingredient by 1.5.
For large batch changes, some bakers reduce yeast slightly — this tool scales linearly as a starting point.
Works with any unit — multiply the number; keep the same unit label.
Enter guest-based servings or multiply original servings to match headcount.
Round to practical measures — half an egg may mean one beaten egg divided in two.
Recipe numbers stay on your device — no upload to EverydayTools servers.
Cooking times and pan sizes may not scale linearly — adjust baking time and pan as needed.
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Reviewed on 2026-06-27.
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Example: 2 cups flour in the original recipe