# Yeast Converter

URL: https://speedycalculator.com/calculators/food/yeast-converter/
Last updated: 2026-10-25

> The yeast converter switches between fresh (cake) yeast, active dry yeast and instant yeast, using the standard ratio of roughly 3 : 1.25 : 1 by weight.

## Inputs

- Amount (g, mg, kg, oz, lb)
- Yeast you have in the recipe

## Results

- Fresh yeast
- Active dry yeast
- Instant yeast

## Formula

```
Active dry = fresh × 0.4
Instant = fresh × 0.33
```

## Explanation

Recipes from different countries specify different yeasts. Using the wrong amount can make dough rise too fast or too slow.

### How to use the Yeast Converter

- **Amount**
- **Yeast you have in the recipe**

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

### How it works

Amounts are converted through fresh-yeast equivalents.

### Inputs explained

FieldWhat to enterAmountUnits: g, mg, kg, oz, lbYeast you have in the recipeChoose one: Instant yeast, Active dry yeast, Fresh (cake) yeast

### What each result means

- **Fresh yeast** = [Amount]÷[Yeast you have in the recipe]
- **Active dry yeast** = [Amount]÷[Yeast you have in the recipe]×0.4
- **Instant yeast** = [Amount]÷[Yeast you have in the recipe]×0.33

### Example values

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

Amount (g)Active dry yeast (g)3.54.25.256.478.58.7510.610.512.71417

## Worked example

Inputs — Amount: 7 g; Yeast you have in the recipe: Instant yeast.

Results — Fresh yeast = 21.2 g; **Active dry yeast = 8.5 g**; Instant yeast = 7 g.

## FAQ

**How much is one packet?**
A standard packet is 7 g (¼ oz) of active dry or instant yeast.

**Do I need to proof instant yeast?**
No, it can be mixed straight into flour.

**What formula does the Yeast Converter use?**
Active dry = fresh × 0.4.