Quick answer: King Arthur Baking lists 1 cup of gluten-free all-purpose flour at 156 g, which works out to 156 g per US cup, 9.8 g per tablespoon and 3.25 g per teaspoon. So 100 g of gluten-free all-purpose flour is about 5/8 cup (0.64 cups).
Checked Oct 23, 2026. King Arthur lists 1 cup of all-purpose flour as 120 g. 100 g ÷ 120 g = 0.833 cup, which this converter shows as 0.833 cups and rounds to the nearest kitchen measure, 7/8 cup.
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Gluten-Free All-Purpose Flour: grams per cup
King Arthur Baking lists 1 cup of gluten-free all-purpose flour at 156 g, which works out to 156 g per US cup, 9.8 g per tablespoon and 3.25 g per teaspoon. So 100 g of gluten-free all-purpose flour is about 5/8 cup (0.64 cups).
Flour weight depends heavily on how the cup is filled: spooning flour into the cup and levelling it gives a lighter cup than scooping straight from the bag.
Grams to cups chart
Grams
Kitchen measure
Cups (decimal)
Tablespoons
25 g
1/8 cup
0.16
2.6
50 g
1/3 cup
0.321
5.1
100 g
5/8 cup
0.641
10.3
125 g
3/4 cup
0.801
12.8
150 g
1 cup
0.962
15.4
200 g
1 1/4 cup
1.282
20.5
250 g
1 5/8 cup
1.603
25.6
300 g
1 7/8 cup
1.923
30.8
400 g
2 5/8 cup
2.564
41
500 g
3 1/4 cup
3.205
51.3
1000 g
6 3/8 cup
6.41
102.6
Cups to grams
Volume
Grams
Ounces
1/4 cup
39 g
1.38 oz
1/3 cup
52 g
1.83 oz
1/2 cup
78 g
2.75 oz
2/3 cup
104 g
3.67 oz
3/4 cup
117 g
4.13 oz
1 cup
156 g
5.5 oz
1 tablespoon
10 g
0.34 oz
1 teaspoon
3 g
0.11 oz
Source: King Arthur Baking, Ingredient Weight Chart. Kitchen measures are rounded to the nearest common cup fraction.
