Quick Answer
One US cup of active dry yeast weighs about 168 grams. That works out to 10.5 g per tablespoon and 3.5 g per teaspoon. 1 tsp ≈ 3.5 g. Instant yeast is slightly lighter (~3.2 g/tsp). Weights vary slightly by brand, moisture, and how tightly you pack - for precise baking, a kitchen scale beats volume measures.
Key Facts
- 1 cup active dry yeast = 168 g
- 1 tablespoon = 10.5 g
- 1 teaspoon = 3.5 g
- 1/2 cup = 84 g
- 1 tsp ≈ 3.5 g. Instant yeast is slightly lighter (~3.2 g/tsp).
- Values assume standard US measures (1 cup = 236.59 mL)
Frequently Asked Questions
How many grams in 1 cup of active dry yeast?
About 168 grams, scoop-and-level for dry ingredients. 1 tsp ≈ 3.5 g. Instant yeast is slightly lighter (~3.2 g/tsp).
How many grams in a tablespoon of active dry yeast?
One US tablespoon (15 mL) of active dry yeast is about 10.5 grams. A teaspoon is 3.5 g.
Why does active dry yeast weigh more (or less) than water?
Dry ingredients are weighed by how they pack into the cup volume. Active Dry Yeast has an apparent density of about 0.71 g/mL - lighter than water - depending on particle size and air gaps.
How many cups is 100 g of active dry yeast?
100 g ÷ 168 g/cup ≈ 0.60 cups - about a little less than a full cup. The reverse table on this page covers 25-1000 g.
Should I weigh or measure by volume?
Weighing is more accurate - volume measures vary with how you scoop, pack, and level, and brands differ by 5-15%. For cookies and cakes where ratios matter, grams are the professional standard. The tables here convert either direction.