Yeast Converter

Converts an amount of fresh, active dry or instant yeast into the other two types, in grams, ounces, teaspoons, packets or fresh-yeast cakes and cubes. It also shows yeast as a percentage of flour and how to replace yeast with sourdough starter.

How to use

1. Under "Yeast you have", choose the type the recipe uses, then enter the amount and unit.
2. Read the equivalent amounts of the other two types in the cards.
3. If your yeast package states a different conversion, change it under "Conversion ratio (fresh yeast = 100)".
4. Enter the flour weight to see each amount as a percentage of flour, or use "Replace with sourdough starter" to get new flour and water amounts.

How it works

• Default ratio: fresh 100 : active dry 42 : instant 33. The sources differ, so the screen shows the range between them (active dry 42–50, instant 32–40).
• One packet is taken as 7 g, about 2¼ teaspoons, so 1 teaspoon is about 3.1 g. No teaspoon weight is given for fresh yeast.
• The starter swap subtracts the flour and water inside the starter from the recipe. The starter percentage is a starting point you can change, and rising takes much longer than with yeast.

Questions and answers

How much dry yeast replaces 10 g of fresh yeast?

With the default ratio, about 4.2 g of active dry yeast or 3.3 g of instant yeast.

Can I swap active dry yeast for instant yeast one to one?

Close, but instant yeast is stronger. Use about 25% less instant yeast, or 25% more active dry yeast when going the other way.

How many grams is a packet of yeast?

A packet of active dry or instant yeast is about 7 g (¼ oz), roughly 2¼ teaspoons.

How much yeast per 500 g of flour?

It depends on the recipe and rising time. 7 g of instant yeast in 500 g of flour is 1.4%; enter your flour weight to see the percentage of any amount.