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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Oats (prepared): grams per cup
King Arthur Baking lists 1 cup of oats (prepared) at 147 g, which works out to 147 g per US cup, 9.2 g per tablespoon and 3.06 g per teaspoon. So 100 g of oats (prepared) is about 2/3 cup (0.68 cups).
Oats are light and fluffy; old-fashioned and quick oats weigh differently.
Grams to cups chart
Grams
Kitchen measure
Cups (decimal)
Tablespoons
25 g
1/8 cup
0.17
2.7
50 g
1/3 cup
0.34
5.4
100 g
2/3 cup
0.68
10.9
125 g
7/8 cup
0.85
13.6
150 g
1 cup
1.02
16.3
200 g
1 3/8 cup
1.361
21.8
250 g
1 2/3 cup
1.701
27.2
300 g
2 cup
2.041
32.7
400 g
2 3/4 cup
2.721
43.5
500 g
3 3/8 cup
3.401
54.4
1000 g
6 3/4 cup
6.803
108.8
Cups to grams
Volume
Grams
Ounces
1/4 cup
37 g
1.3 oz
1/3 cup
49 g
1.73 oz
1/2 cup
74 g
2.59 oz
2/3 cup
98 g
3.46 oz
3/4 cup
110 g
3.89 oz
1 cup
147 g
5.19 oz
1 tablespoon
9 g
0.32 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.
