how many grams in a cup of yeast?

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things people ask

• When would I ever measure yeast in cups?
  Cup-scale yeast shows up when you scale a bakery formula for a single mixer batch — say a 10-kilogram dough that needs 1 to 2 percent yeast. It's also how some old fresh-yeast recipes describe crumbled cake yeast for sweet doughs like panettone or kulich. For any standard home loaf, a cup of yeast would massively over-leaven the dough and produce a sour, alcoholic flavor.
• Is a cup of fresh yeast the same weight as a cup of instant?
  No. Crumbled fresh cake yeast is dense and moist, packing closer to 144 grams per cup, while instant or active dry granules are much lighter — usually 130-150 grams per cup depending on how firmly the cup is tapped. Fresh yeast also contains around 70 percent water, so swapping by volume rather than weight throws the hydration of a large dough off noticeably.
• How do I scale a home recipe up to cup-level yeast amounts?
  Convert the recipe to baker's percentages first. Dry yeast is typically 0.5-1 percent of flour weight; fresh is roughly triple that. For a 5-kilogram flour batch at 1 percent instant yeast, you want 50 grams — well under a cup. Scaling by volume past tablespoon level invites compounding error, so always switch to a gram scale once you're working in bulk.

related conversions

• Yeast: tablespoons to grams
• Yeast: teaspoons to grams
• Yeast guide