Yeast Conversion
Calculator
Results
- Active dry yeast (g)
- 12
- Instant yeast (g)
- 10
Cooking results
| Active dry yeast (g) | 12 |
| Instant yeast (g) | 10 |
formula-map diagram
- Active dry yeast (g)
- 12
- Instant yeast (g)
- 10
Formula breakdown
Formula
active dry = fresh ÷ 2.5; instant = fresh ÷ 3 (standard yeast equivalence)= 12
Note
Simplified model: results are standard culinary ratios and stated per-kilogram rates. Real ovens, flours, ingredients and food-safety requirements vary, so use a thermometer and your own judgement.
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See all →Frequently asked questions
Why do different yeast types need different amounts for the same recipe?+
Active dry, instant, and fresh (cake) yeast have different concentrations of live yeast cells per gram, so a recipe written for one type needs a different quantity if you're substituting another; instant yeast is generally used at a lower quantity than active dry for the same effect.
What's the general ratio between active dry and instant yeast?+
Instant yeast is typically used at about 75% of the weight of active dry yeast for the same rise, since instant yeast has more live cells per gram and doesn't need proofing in water first.
How does fresh (cake) yeast compare to dried yeast?+
Fresh yeast is used at roughly double the weight of active dry yeast (or about 2.5 to 3 times the weight of instant yeast), since it contains more moisture and fewer live cells by weight than dried forms.
Does yeast conversion also require a time or temperature adjustment?+
Fresh and active dry yeast typically need proofing time in warm water before mixing, while instant yeast can be added directly to dry ingredients, so beyond the quantity conversion, adjust your process, not just the amount, when substituting.
Why might my substituted yeast still perform differently even with the right conversion?+
Yeast potency can vary by age and storage conditions, especially for fresh yeast which has a short shelf life, so the conversion ratio is a reliable starting point but final rise time should still be judged by dough behavior, not the clock alone.