How many grams in a cup of dry yeast?

1 tablespoon of instant yeast weighs 9 g by King Arthur Baking's chart, or 144 g per cup. King Arthur lists 2¼ teaspoons at 7 g, and Red Star says a 7 g packet holds about 2¼ teaspoons.

Sources: King Arthur Baking ingredient weight chart, Red Star Yeast, USDA FoodData Central · Checked October 22, 2026

Amount

Unit

144 g 5.1 oz

Sources range from 144 g to 192 g for 1 cup.

Converting a whole recipe?

Sous Chef converts every ingredient in a recipe to grams and millilitres in one tap, rounded to amounts you would actually weigh.

Dry yeast cups to grams table

Using 144 g per US cup. A US cup is 236.6 mL; 1 cup is 16 tablespoons.

Dry yeast cups to grams
US cups	Grams	Ounces	Tablespoons
⅛ cup	18 g	0.6 oz	2
¼ cup	36 g	1.3 oz	4
⅓ cup	48 g	1.7 oz	5.3
½ cup	72 g	2.5 oz	8
⅔ cup	96 g	3.4 oz	10.7
¾ cup	108 g	3.8 oz	12
1 cup	144 g	5.1 oz	16
1½ cups	216 g	7.6 oz	24
2 cups	288 g	10.2 oz	32
3 cups	432 g	15.2 oz	48
4 cups	576 g	20.3 oz	64

Why sources disagree

Recipes measure yeast by the teaspoon or the packet, and the packet figures agree: King Arthur lists 2¼ teaspoons at 7 g, and Red Star says a 7 g packet holds about 2¼ teaspoons. USDA's active dry entry is heavier per spoon, 4 g per teaspoon and 12 g per tablespoon, though it lists a packet at 7.2 g. Red Star says active dry and instant yeast can be swapped 1:1, with active dry rising a little more slowly.

Source	Listed as	Grams per cup
King Arthur Baking ingredient weight chart Yeast (instant)	1 tablespoon = 9 g	144 g
Red Star Yeast Active Dry Yeast (product FAQ)	1 packet (7 g) = about 2¼ teaspoons	149 g
USDA FoodData Central Leavening agents, yeast, baker's, active dry	1 tablespoon = 12 g	192 g

Bold row is the figure the calculator uses. Figures listed for a smaller measure are multiplied up to one cup.

How to measure dry yeast accurately

Weigh yeast on a scale that reads to 0.1 g when a recipe lists grams.
Swap active dry and instant yeast 1:1, but expect active dry dough to take a little longer to rise.
Level each spoon with a knife, since a heaped teaspoon adds noticeably more yeast.

Convert the whole recipe, not one line

Converting a recipe one ingredient at a time is where mistakes slip in. Sous Chef imports a recipe from a link or pasted text, then converts every ingredient at once: dry ingredients and butter to grams, liquids to millilitres. Tap again to go back to cups.

US recipe

2¼ cups all-purpose flour
1 cup butter, softened
¾ cup brown sugar, packed
1½ cups milk

In Sous Chef, after "Convert to metric"

275 g all-purpose flour
225 g butter, softened
170 g brown sugar, packed
350 ml milk

Example output. Sous Chef rounds to amounts you would actually weigh, so its numbers can differ by a few grams from the table above.

Common questions

How many grams of yeast are in a packet?

A standard packet of dry yeast is 7 g, about 2¼ teaspoons, by Red Star, and King Arthur Baking lists 2¼ teaspoons at 7 g. USDA lists 7.2 g per packet.

How many grams is 1 teaspoon of yeast?

1 teaspoon of instant yeast is about 3 g, using King Arthur's 9 g per tablespoon. USDA lists 4 g per teaspoon of active dry yeast.

How many grams is 1 tablespoon of yeast?

1 tablespoon of instant yeast is 9 g by King Arthur Baking. USDA lists 12 g per tablespoon of active dry yeast.

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