Your recipe calls for fresh yeast, but the cupboard only holds dry yeast? No problem, because the two types convert into each other reliably. The fastest way is the Yeast Converter (fresh ↔ dry): enter the amount, pick the direction and you are done. This article explains the rule behind it and shares the most useful baking tips.
The basic ratio: fresh yeast weighs three times as much
The difference between fresh and dry yeast is the water content. Fresh yeast holds a lot of moisture, while dry yeast is dehydrated and therefore more concentrated. By weight the simple rule of thumb applies: fresh yeast equals about three times the amount of dry yeast. So 21 g of dry yeast in a recipe becomes roughly 63 g of fresh yeast. The other way round, divide the fresh yeast by three to find the matching amount of dry yeast.
Blocks and packets: the typical amounts
In shops you meet two standard sizes. One block of fresh yeast weighs 42 g and one packet of dry yeast weighs 7 g. This gives the most practical baking rule of all: one block of fresh yeast (42 g) equals about two packets of dry yeast (14 g) and is enough for roughly 500 g of flour. That way you rarely need to calculate and simply reach for the standard amount.
A conversion example
Say your recipe lists half a block of fresh yeast, that is 21 g, but you only have dry yeast. The maths: 21 g divided by 3 equals 7 g of dry yeast, exactly one packet. A whole block (42 g) equals 14 g of dry yeast, so two packets. The converter returns these values instantly, including the conversion into blocks or packets, leaving no room for doubt.
Handling tips for baking
Beyond the amount, handling matters. Dry yeast is usually mixed straight into the flour and needs no preparation. Fresh yeast, however, is best dissolved in a little lukewarm liquid before it joins the dough so it works evenly. Liquid that is too hot harms the yeast cells, while liquid that is too cold slows the rise. For a reliable result, work out the amounts first with the Yeast Converter (fresh ↔ dry) and then bake with confidence.
