Yeast Converter

Quick answer

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.

Fresh yeast
—
Active dry yeast
—
Instant yeast
—

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

  1. Amount
  2. 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

Field What to enter
Amount Units: g, mg, kg, oz, lb
Yeast you have in the recipe Choose 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)
3.5 4.2
5.25 6.4
7 8.5
8.75 10.6
10.5 12.7
14 17

Formula

Active dry = fresh × 0.4Instant = fresh × 0.33

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.

Frequently asked questions

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.

Cite this calculator

Speedy Calculator. (2026). Yeast Converter. Speedy Calculator. https://speedycalculator.com/calculators/food/yeast-converter/