Grams to Cups: Rolled Oats
If your recipe is written in cups but your scale reads grams — or the other way round — this page solves the conversion for rolled oats. One cup of rolled oats weighs about 90 grams, which works out to a density of 0.38 g/ml. From there, half a cup is roughly 45 g, a quarter cup about 23 g, and one tablespoon about 6 g.
Converting between weight and volume depends on density, and density is specific to each ingredient: a cup of rolled oats does not weigh the same as a cup of flour or sugar. That is why this tool uses the measured density of rolled oats, taken from the USDA FoodData Central database, rather than a one-size-fits-all figure.
Cooking measurement converter — Rolled Oats
Result
1.11 cups
Common measures — Rolled Oats
| Measure | Grams |
|---|---|
| 1 cup | 90 g |
| ¾ cup | 68 g |
| ½ cup | 45 g |
| ⅓ cup | 30 g |
| ¼ cup | 23 g |
| 1 tbsp | 5.6 g |
| 1 tsp | 1.9 g |
Data source: USDA FoodData Central
How to measure rolled oats accurately
For rolled oats, spoon it into the cup and level it off; do not shake or tap the cup, which settles the contents and changes the weight. Weighing in grams is still the most reliable method when the amount matters.
Frequently asked questions
How many grams are in a cup of rolled oats?
One cup of rolled oats weighs about 90 grams. Half a cup is roughly 45 grams and a quarter cup about 23 grams.
How many cups is 100 grams of rolled oats?
100 grams of rolled oats is about 1.11 cups. Use the calculator above for any other amount.
Where does this value come from?
From the ingredient's measured density (0.38 g/ml), referenced to the USDA FoodData Central database. Bear in mind the real weight can vary slightly with brand and moisture.
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