Cups to Grams: All-Purpose Flour
1 cup of all-purpose flour is about 120 grams. Enter any amount to convert it.
How many grams are in a cup of all-purpose flour?
One US cup of all-purpose flour weighs about 120 grams (4.2 ounces). Half a cup is about 60 g, and one tablespoon is about 7.5 g.
Spoon flour into the cup and level it off with a knife. Scooping straight from the bag packs the flour down and can add 20 g or more per cup, which is the most common reason cakes turn out dry.
All-Purpose Flour conversion chart
| Volume | Grams | Ounces |
|---|---|---|
| ¼ cup | 30 g | 1.1 oz |
| ⅓ cup | 40 g | 1.4 oz |
| ½ cup | 60 g | 2.1 oz |
| ⅔ cup | 80 g | 2.8 oz |
| ¾ cup | 90 g | 3.2 oz |
| 1 cup | 120 g | 4.2 oz |
| 1½ cups | 180 g | 6.3 oz |
| 2 cups | 240 g | 8.5 oz |
| 1 tablespoon | 7.5 g | 0.3 oz |
| 1 teaspoon | 2.5 g | 0.1 oz |
How to measure all-purpose flour so it matches the recipe
The 120 g figure assumes the spoon-and-level method. Fluff the flour with a fork, spoon it lightly into the cup until it mounds, then sweep the top flat with the back of a knife. Dipping the cup straight into the bag compacts the flour and usually delivers 140 to 150 g, roughly 15 to 25 percent more than the recipe author intended.
Sifting changes the number too. Flour that is sifted and then spooned into the cup is lighter, often 100 to 115 g. Recipe wording matters here: "1 cup sifted flour" means sift first and then measure, while "1 cup flour, sifted" means measure first and sift afterward. If a recipe gives grams, none of that applies and you can simply weigh the flour.
Where the weight matters most
Yeast dough, pie crust and cookies are the least forgiving. An extra 20 g of flour in a pie crust makes the dough stiff and the baked crust tough, while a muffin or quick bread batter tolerates more drift. Flour also takes up moisture from the air, so a bag stored through a humid summer can act slightly wetter than the same bag in winter.
To approximate cake flour, take 2 tablespoons out of each cup of all-purpose flour, replace them with 2 tablespoons of cornstarch, and sift the mixture a few times. All-purpose flour and bread flour can be swapped by weight, though the bread flour will give a chewier result.
Frequently asked questions
How many cups is 100 grams of all-purpose flour?
100 g of all-purpose flour is about 0.83 cups.
How many grams is a tablespoon of all-purpose flour?
About 7.5 g, based on 120 g per cup and 16 tablespoons per cup.
How many cups is a pound of all-purpose flour?
A pound (454 g) is about 3¾ cups, and a standard 5-pound bag holds roughly 19 cups.
How many grams are 2 cups of all-purpose flour?
Two cups is about 240 g and three cups is about 360 g when the flour is spooned and leveled.
Does the brand of all-purpose flour change the weight?
Only slightly. The bigger difference between brands is protein, which runs from roughly 8 to 12 percent and changes how much water the dough absorbs more than how much a cup weighs.