Cups & Temps

How many grams in a cup of rolled oats?

One US cup of rolled oats weighs about 81 grams (2.86 oz). A tablespoon is about 5.1 g and a teaspoon about 1.7 g.

1 cup
81 gUSDA FDC SR Legacy 173904 'Cereals, oats, regular and…
1 tablespoon
5.1 g1/16 cup
1 teaspoon
1.7 g1/48 cup
100 grams
1.23 cup19.8 tablespoons

Weights from USDA FoodData Central and King Arthur Baking. Checked .

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81grams

1 cup of rolled oats = 81 grams

    Rolled oats cups to grams chart

    CupsGramsOunces
    1/8 cup10.1 g0.357 oz
    1/4 cup20.2 g0.714 oz
    1/3 cup27 g0.952 oz
    1/2 cup40.5 g1.43 oz
    2/3 cup54 g1.9 oz
    3/4 cup60.8 g2.14 oz
    1 cup81 g2.86 oz
    1 1/2 cups122 g4.29 oz
    2 cups162 g5.71 oz
    3 cups243 g8.57 oz
    4 cups324 g11.4 oz

    Rolled oats grams to cups

    GramsCupsTablespoons
    25 g0.309 cups4.94 tbsp
    50 g0.617 cups ≈ 5/8 cup9.88 tbsp
    100 g1.23 cups19.8 tbsp
    125 g1.54 cups24.7 tbsp
    150 g1.85 cups29.6 tbsp
    200 g2.47 cups39.5 tbsp
    250 g3.09 cups49.4 tbsp
    300 g3.7 cups59.3 tbsp
    400 g4.94 cups79 tbsp
    500 g6.17 cups98.8 tbsp
    1000 g12.3 cups198 tbsp

    How we got 81 g

    USDA FDC SR Legacy 173904 'Cereals, oats, regular and quick, not fortified, dry': 1 cup = 81 g.

    • King Arthur (old-fashioned or quick): 89 g per cup

    Flake size and how the cup is filled (shaken vs loose) vary weight ~10%.

    Questions people ask

    How many cups is 100 grams of rolled oats?

    About 1.23 cups (19.8 tablespoons).

    How many grams is 1/2 cup of rolled oats?

    About 40.5 grams.

    Sources