One packet of yeast is commonly referred to as one envelope. Generally, 1 envelope of instant dry yeast contains 1/4 oz of yeast. So to know how much yeast is in one packet, we can multiply that by 9 or 10 to get the equivalent measurement in tsp. Therefore, 1 packet will contain about 2.25-2.5 tsp of yeast!

Each package of yeast contains one ounce, which is equivalent to seven grams or 2 teaspoons. All types of yeast contain the same amount of yeast in the package – 2 1/4 tsp. A packet of yeast typically contains 2 1/4 teaspoons of yeast, which can also be measured by 1/4 ounce or 7 grams.

One packet of active dry yeast is equivalent to 1/4 oz in weight. The volume of 1 packet of active dry yeast would approximately equal to 2 1/4 tsp. If you were to purchase one packet of instant yeast that would approximately equal 1/4 oz or 2 1/4 tsp. Bread machine yeast would all equal to 1/4 oz or 2 1/4 tsp for one packet of bread machine yeast.