1 Cup Oats in Grams
1 cup of oats weighs:
90 g
US cup (240 ml)
94 g
Metric / AU cup (250 ml)
American recipes mean the 240 ml cup; Australian, British and New Zealand recipes mean the 250 ml metric cup. If the recipe does not say, the cuisine usually tells you — see the full cups to grams guide.
Rolled oats are light and flaky, at about 90 g per cup — one of the lightest common baking ingredients by volume. Steel-cut oats are much denser because the grain is chopped rather than flattened.
Rolled oats cup to gram chart
| Cups | US (240 ml) | Metric (250 ml) |
|---|---|---|
| ¼ cup | 23 g | 23 g |
| ⅓ cup | 30 g | 31 g |
| ½ cup | 45 g | 47 g |
| ⅔ cup | 60 g | 63 g |
| ¾ cup | 68 g | 70 g |
| 1 cup | 90 g | 94 g |
| 1½ cups | 135 g | 141 g |
| 2 cups | 180 g | 188 g |
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= 125 g
Frequently asked questions
How many grams is 1 cup of oats?
1 US cup of oats is 90 g. In an Australian, UK or NZ metric cup (250 ml) it is 94 g. Weighing is more accurate than measuring by volume.
How many grams is half a cup of oats?
Half a US cup of oats is 45 g, and three-quarters of a cup is 68 g.
Are rolled oats and quick oats the same weight?
Close. Quick oats are rolled thinner and broken smaller so they pack slightly denser, around 95 g per cup against 90 g for standard rolled oats. Recipes swap them by volume without adjusting.
How much do steel-cut oats weigh per cup?
Considerably more — around 180 g, roughly double rolled oats, because the grain is cut rather than flattened and packs tightly. Never substitute them cup-for-cup in baking.