One cup of rolled oats is approximately 90 grams. Quick oats are about 80g and steel-cut oats are around 170g per cup. Use the chart and calculator below for any amount.
| Cups | Grams | Ounces | Servings |
|---|---|---|---|
| ¼ cup | 23g | 0.8 oz | 1 small |
| ⅓ cup | 30g | 1.1 oz | 1 serving |
| ½ cup | 45g | 1.6 oz | 1 serving |
| ¾ cup | 68g | 2.4 oz | 1-2 servings |
| 1 cup | 90g | 3.2 oz | 2 servings |
| 1½ cups | 135g | 4.8 oz | 3 servings |
| 2 cups | 180g | 6.3 oz | 4 servings |
| 3 cups | 270g | 9.5 oz | 6 servings |
| Oat Type | 1 Cup (g) | ½ Cup (g) | Notes |
|---|---|---|---|
| Rolled oats (old-fashioned) | 90g | 45g | Most common |
| Quick oats (instant) | 80g | 40g | Lighter, finer |
| Steel-cut oats | 170g | 85g | Densest, chewy |
| Oat flour | 85g | 43g | Ground oats |
| Oat bran | 120g | 60g | High fiber |
How many grams in a cup of oats?
One cup of rolled oats is approximately 90 grams. Quick oats are about 80g and steel-cut oats are around 170g per cup.
How many grams in half a cup of oats?
Half a cup of rolled oats is approximately 45 grams.
How many grams in a cup of quick oats?
One cup of quick (instant) oats is approximately 80 grams.
How many grams in a cup of steel-cut oats?
One cup of steel-cut oats is approximately 170 grams, since they are denser than rolled oats.
What is one serving of oats?
A standard serving of oatmeal is ½ cup of dry rolled oats (about 45 grams), which makes roughly 1 cup cooked.