Fresh Yeast Conversion
Written by Mustapha B. · Updated August 13, 2026
Convert fresh yeast to dry (fresh ≈ 2.5× active dry).
Instant ≈ 75% of active dry; fresh ≈ 2.5× active dry (by weight).
Fresh yeast, sometimes called cake or compressed yeast, holds more moisture than dried yeast, so you need more of it by weight. The common guideline is that fresh yeast is about 2.5 times the amount of active dry. So if a recipe calls for 7 grams of active dry (one packet), you would use roughly 17 to 18 grams of fresh yeast. Going the other way, divide the fresh amount by 2.5 to find the active dry equivalent.
To compare fresh with instant yeast, the ratio is larger still, since instant is more concentrated than active dry. Roughly speaking, fresh yeast is about three times the weight of instant. A practical tip: crumble fresh yeast into your warm liquid and let it dissolve before mixing, and check the date, as fresh yeast is perishable and only lasts a couple of weeks refrigerated. It should be pale, firm, and smell mildly of bread.
Yeast Converter
Instant ≈ 75% of active dry; fresh ≈ 2.5× active dry (by weight).
| Unit | Equivalent |
|---|---|
| 1 active dry yeast | 0.8 instant / rapid-rise · 2.5 fresh / cake yeast |
| 1 instant / rapid-rise | 1.25 active dry yeast · 3.13 fresh / cake yeast |
| 1 fresh / cake yeast | 0.4 active dry yeast · 0.32 instant / rapid-rise |
Tips
- Instant yeast can be mixed straight into the flour; active dry is best proofed first.
- If swapping active dry for instant, you can use about 25% less.
Frequently asked questions
How do I convert fresh yeast to dry yeast?
Divide the fresh yeast amount by about 2.5 to get active dry yeast. For example, 25 grams of fresh yeast equals roughly 10 grams of active dry.
How much fresh yeast equals one packet of dry yeast?
One standard 7-gram packet of active dry yeast is equal to about 17 to 18 grams of fresh yeast.