# Recipe Scaler

URL: https://speedycalculator.com/calculators/food/recipe-scaler/
Last updated: 2026-10-25

> The recipe scaler adjusts an ingredient amount when you change the number of servings, by multiplying by the ratio of new to original servings. Use it for each ingredient to double, halve or resize any recipe.

## Inputs

- Ingredient amount
- Original servings
- New servings

## Results

- Scaling factor
- New amount

## Formula

```
New amount = original amount × new servings ÷ original servings
```

## Explanation

Most ingredients scale in proportion, but leavening, salt, spices and baking times may need fine-tuning when scaling a lot.

### How to use the Recipe Scaler

- **Ingredient amount**
- **Original servings**
- **New servings**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

The scaling factor is new servings divided by original servings; every ingredient is multiplied by it.

### Inputs explained

FieldWhat to enterIngredient amountA numberOriginal servingsA numberNew servingsA number

### What each result means

- **Scaling factor** = [New servings]÷[Original servings]
- **New amount** = [Ingredient amount]×[Scaling factor]

### Example values

How the main result changes when **Ingredient amount** changes and everything else stays at the example values above:

Ingredient amountNew amount125312.5187.5468.75250625312.5781.25375937.55001,250

## Worked example

Inputs — Ingredient amount: 250; Original servings: 4; New servings: 10.

Results — Scaling factor = 2.5 ×; **New amount = 625**.

## FAQ

**Does baking time change?**
Larger batches in deeper pans usually need longer; check for doneness early.

**Should I scale eggs exactly?**
Round to whole eggs, or beat and measure by weight (about 50 g per large egg).

**What formula does the Recipe Scaler use?**
New amount = original amount × new servings ÷ original servings.