1 cup of rolled oats in grams
1 cup of rolled oats ≈ 90 grams
That is about 3.17 ounces. One US cup of rolled oats weighs 90 g.
Why this number is approximate
Very light and airy. Steel-cut oats are much denser at around 180 g per cup — the two are not interchangeable by volume.
Rolled oats conversion table
| Cups | Grams | Ounces | Tablespoons |
|---|---|---|---|
| 1/4 | 22.5 g | 0.79 oz | 4 |
| 1/3 | 30 g | 1.06 oz | 5.33 |
| 1/2 | 45 g | 1.59 oz | 8 |
| 2/3 | 60 g | 2.12 oz | 10.7 |
| 3/4 | 67.5 g | 2.38 oz | 12 |
| 1 | 90 g | 3.17 oz | 16 |
| 1 1/2 | 135 g | 4.76 oz | 24 |
| 2 | 180 g | 6.35 oz | 32 |
| 2 1/2 | 225 g | 7.94 oz | 40 |
| 3 | 270 g | 9.52 oz | 48 |
| 4 | 360 g | 12.7 oz | 64 |
Weigh it if you can
Volume measures are convenient but imprecise — the same cup can hold noticeably different amounts depending on how the ingredient is packed, how humid the room is, and whether it was sifted. A digital kitchen scale removes the variable entirely, which is why professional and European recipes give weights. If you bake regularly, a scale is the cheapest accuracy upgrade available.
Frequently asked questions
How many grams is 1 cup of rolled oats?
About 90 grams, or 3.17 ounces.
How many grams in a cup of rolled oats?
Roughly 90 grams per US cup.
Is a US cup the same as a metric cup?
No. A US customary cup is 236.6 ml; a metric cup — used in Australia, New Zealand and much of Europe — is 250 ml, about 6% larger. An imperial cup, still seen in older British recipes, is 284 ml. For a cup of rolled oats that is a difference of roughly 5.1 g between US and metric.
Should I sift before or after measuring?
It matters, and recipes are often ambiguous. "1 cup sifted flour" means sift first, then measure — which gives less flour than "1 cup flour, sifted", where you measure first. When in doubt, weigh.
Other amounts
- 1/4 cups of rolled oats to grams
- 1/3 cups of rolled oats to grams
- 1/2 cups of rolled oats to grams
- 2/3 cups of rolled oats to grams
- 3/4 cups of rolled oats to grams
- 1 1/2 cups of rolled oats to grams
- 2 cups of rolled oats to grams
- 2 1/2 cups of rolled oats to grams
- 3 cups of rolled oats to grams
- 4 cups of rolled oats to grams
- 1/4 tablespoons of rolled oats to grams
- 1/3 tablespoons of rolled oats to grams
- 1/2 tablespoons of rolled oats to grams
- 2/3 tablespoons of rolled oats to grams
- 3/4 tablespoons of rolled oats to grams
- 1 tablespoon of rolled oats to grams
- 1 1/2 tablespoons of rolled oats to grams
- 2 tablespoons of rolled oats to grams
- 2 1/2 tablespoons of rolled oats to grams
- 3 tablespoons of rolled oats to grams
- 4 tablespoons of rolled oats to grams
- 1/4 teaspoons of rolled oats to grams
- 1/3 teaspoons of rolled oats to grams
- 1/2 teaspoons of rolled oats to grams
- 2/3 teaspoons of rolled oats to grams
- 3/4 teaspoons of rolled oats to grams