How Many Grams in a Cup of All-Purpose Flour?
One cup of all-purpose flour weighs 120 grams when spooned into the cup and levelled off with a straight edge and this page converts all-purpose flour between cups, grams, tablespoons, teaspoons, millilitres and ounces, with full tables, worked examples and a free converter.
| Measure | Weight |
|---|---|
| 1 cup | 120 g |
| 1 tablespoon | 7.5 g |
| 1 teaspoon | 2.5 g |
| 1 cup (volume) | 236.6 ml |
| 1 cup in ounces | 4.2 oz |
| 100 grams | 0.83 cups |
One cup of all-purpose flour weighs 120 grams — but only when it is spooned into the cup and levelled off. Scoop straight from the bag and the same cup can hold 140 grams or more, enough to dry out a cake. Below are the full conversion tables, a converter for any amount, and the measuring method behind the number.
Convert all-purpose flour instantly
This converter uses the same chef-reviewed database as our Cups to Grams converter for all 128 ingredients. Weights assume a US cup of 236.588 ml; see our methodology and sources.
Cups to grams: all-purpose flour
| Cups | Grams |
|---|---|
| ¼ cup | 30 g |
| ⅓ cup | 40 g |
| ½ cup | 60 g |
| ⅔ cup | 80 g |
| ¾ cup | 90 g |
| 1 cup | 120 g |
| 1½ cups | 180 g |
| 2 cups | 240 g |
| 3 cups | 360 g |
| Measure | Grams |
|---|---|
| 1 tablespoon | 7.5 g |
| 1 teaspoon | 2.5 g |
| 1 cup in ounces | 4.2 oz |
Grams to cups: all-purpose flour
| Grams | Cups (decimal) | Cups (fraction) |
|---|---|---|
| 50 g | 0.42 cups | ⅜ cups |
| 100 g | 0.83 cups | ⅞ cups |
| 125 g | 1.04 cups | 1 cup |
| 150 g | 1.25 cups | 1 ¼ cups |
| 200 g | 1.67 cups | 1 ⅔ cups |
| 250 g | 2.08 cups | 2 ⅛ cups |
| 300 g | 2.5 cups | 2 ½ cups |
| 400 g | 3.33 cups | 3 ⅓ cups |
| 500 g | 4.17 cups | 4 ⅛ cups |
Working with more than one ingredient? The grams in a cup chart puts 40 ingredients in one table, and the Whole Recipe Converter converts a full ingredient list in a single paste.
How to measure all-purpose flour properly
Spoon and level — never scoop. Stir the flour in its bag or bin to loosen it, spoon it into the cup until it heaps above the rim, then sweep a knife across the top. That cup weighs 120 grams. A cup scooped directly from the bag packs the flour down and regularly weighs 140 grams or more — up to 20 percent extra flour in your batter, with no warning.
Mind the word “sifted”. “1 cup sifted flour” means sift first, then measure, and that lighter cup weighs roughly 100–110 grams. “1 cup flour, sifted” means measure the full 120 grams first and sift afterwards. The word order in the recipe changes the weight, so read it literally.
Flour settles and absorbs moisture. A bag that has sat for weeks compacts, and in a humid kitchen the flour itself takes on water. A quick whisk or stir before measuring undoes the settling; for anything delicate, the scale removes the guesswork entirely.
Frequently asked questions
How many grams are in a cup of all-purpose flour?
120 grams, when the flour is spooned into the cup and levelled off — the standard method behind the King Arthur Baking weight chart. Scooped straight from the bag, the same cup can weigh 140 grams or more, which is why the method matters as much as the number.
How many grams are in half a cup of all-purpose flour?
60 grams. A quarter cup is 30 grams and a third of a cup is 40 grams. Halving and quartering the 120-gram cup is exact for flour, so these smaller amounts are safe to take straight from the table above.
How many cups is 250 grams of all-purpose flour?
About 2.08 cups — call it 2 cups plus 1⅓ tablespoons. Divide any gram amount by 120 to get cups of all-purpose flour: 250 ÷ 120 ≈ 2.08. For baking, weighing the 250 grams directly is more accurate than assembling the fractional cups.
Sources: the weight on this page is based on published values from the King Arthur Baking ingredient weight chart and USDA FoodData Central, chosen and checked as described in our methodology.