How many grams in a cup of rolled oats?
1 cup of rolled oats weighs 81 g.1 tablespoon: 5.1 g1 teaspoon: 1.7 g
Weights are for rolled oats (dry), in US customary cups.
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= 81 g
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Cups to grams
| Cups | Grams |
|---|---|
| ⅛ cup | 10 g |
| ¼ cup | 20 g |
| ⅓ cup | 27 g |
| ½ cup | 41 g |
| ⅔ cup | 54 g |
| ¾ cup | 61 g |
| 1 cup | 81 g |
| 1 ½ cups | 122 g |
| 2 cups | 162 g |
| 3 cups | 243 g |
Grams to cups
| Grams | US measure |
|---|---|
| 25 g | ≈ ¼ cup + 1 tbsp |
| 50 g | ≈ ⅝ cup |
| 100 g | ≈ 1 ¼ cups |
| 150 g | ≈ 1 ⅞ cups |
| 200 g | ≈ 2 ½ cups |
| 250 g | 3 cups + 1 tbsp |
| 500 g | 6 cups + 3 tbsp |
| 1,000 g | 12 ⅜ cups |
Rounded to amounts you can measure; ≈ marks a rounded answer.
Measuring rolled oats
These weights are for rolled oats (dry). A different form, or a cup filled another way, weighs differently, so weigh it if the recipe gives grams.
The King Arthur Baking ingredient weight chart gives 89 g per cup. We use the USDA figure throughout.
Source
USDA FoodData Central, food 173904: “Cereals, oats, regular and quick, not fortified, dry”, 1 cup = 81 g (USDA FoodData Central SR Legacy, April 2018). Other amounts are calculated with 1 cup = 16 tablespoons = 48 teaspoons. Data version 2026-10-17.1, reviewed 16 October 2026.
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