Recipe Scaling Calculator
Scaling an Entire Ingredient List at Once
Scaling one ingredient is simple multiplication; scaling a whole recipe means applying the same ratio consistently across every line so nothing drifts out of proportion. This calculator applies a single scaling ratio, derived from the change in servings, to up to five ingredients in one pass.
The Formula
Scaling Ratio = Desired Servings / Original Servings
New Amount = Original Amount × Scaling Ratio
New Amount = Original Amount × Scaling Ratio
The same ratio is applied to every ingredient, so relative proportions in the recipe — the balance of flour to sugar to liquid, for instance — stay exactly as the original author intended.
Where This Matters
- Full recipe conversion — turning a 4-serving recipe into an 8- or 20-serving batch without recalculating each ingredient by hand.
- Meal prep planning — scaling a whole week's worth of a dish from a single-serving base recipe.
- Consistency checks — verifying a scaled recipe matches the proportions of the original before committing ingredients to the bowl.
Worked Example
| Ingredient | Original amount | Scaled amount |
|---|---|---|
| Flour | 2 cups | 5 cups |
| Sugar | 0.75 cup | 1.875 cups |
| Butter | 0.5 cup | 1.25 cups |
| Eggs | 2 | 5 |
Scaling Ratio = 10 / 4 = 2.5; each original amount is multiplied by 2.5.
How to Use This Calculator
- Enter the Original Servings and Desired Servings for the recipe.
- For each ingredient (up to five), enter its optional name and its Amount in the original recipe.
- Select Calculate to get every ingredient scaled to the new serving count in one step.
Related Calculations
For a single ingredient adjustment, the Recipe Converter is quicker, and the Baking Ratio Calculator is useful for checking bread and pastry proportions once scaled.