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How many grams is a teaspoon of instant yeast?

1 teaspoon of instant yeast weighs 3 grams (0.11 oz), according to King Arthur Baking — Ingredient Weight Chart.

Instant yeast: cups to grams

AmountGramsOunces
1/4 cup36 g1.3 oz
1/3 cup48 g1.7 oz
1/2 cup72 g2.5 oz
2/3 cup96 g3.4 oz
3/4 cup108 g3.8 oz
1 cup144 g5.1 oz
1 tablespoon9 g0.32 oz
1 teaspoon3 g0.11 oz

US cup = 236.6 ml. Measured level.

FAQ

How many grams is 1/2 cup of instant yeast?

1/2 cup of instant yeast is about 72 grams, based on 144 g per US cup (King Arthur Baking — Ingredient Weight Chart).

How many grams is 1/4 cup of instant yeast?

1/4 cup of instant yeast is about 36 grams.

How many ounces is a cup of instant yeast?

A US cup of instant yeast weighs about 5.1 oz (144 g).

Why weigh instead of using cups?

Cups measure volume, so how you fill them changes how much you get. A kitchen scale gives the same amount every time, which is why bakers weigh.

Source: King Arthur Baking — Ingredient Weight Chart (144 g per US cup). Other amounts are calculated from that figure.