Rolled Oats: Cups to Grams
One US cup (240 ml) of rolled oats weighs about 90 grams, based on its typical kitchen density. Convert any amount below, or use the reference table for common cup fractions.
1 cup=90 g
Based on rolled oats at 90 g per US cup.
Rolled Oats conversion table
| Cups | Grams | Millilitres | Tablespoons | Ounces |
|---|---|---|---|---|
| 1/4 cup | 22.5 g | 60 ml | 4 tbsp | 0.794 oz |
| 1/3 cup | 30 g | 80 ml | 5.33 tbsp | 1.06 oz |
| 1/2 cup | 45 g | 120 ml | 8 tbsp | 1.59 oz |
| 2/3 cup | 60 g | 160 ml | 10.7 tbsp | 2.12 oz |
| 3/4 cup | 67.5 g | 180 ml | 12 tbsp | 2.38 oz |
| 1 cup | 90 g | 240 ml | 16 tbsp | 3.17 oz |
| 1 1/2 cups | 135 g | 360 ml | 24 tbsp | 4.76 oz |
| 2 cups | 180 g | 480 ml | 32 tbsp | 6.35 oz |
| 2 1/2 cups | 225 g | 600 ml | 40 tbsp | 7.94 oz |
| 3 cups | 270 g | 720 ml | 48 tbsp | 9.52 oz |
In grams, 1/4 cup of rolled oats is about 23 g, 1/3 cup is about 30 g, 1/2 cup is about 45 g, 2/3 cup is about 60 g, 3/4 cup is about 68 g, 1 cup is about 90 g, 1 1/2 cups is about 135 g, 2 cups is about 180 g and 3 cups is about 270 g.
A tablespoon of rolled oats is about 5.6 grams, and a teaspoon is about 1.9 grams.
About measuring rolled oats
Rolled oats are flat, light flakes with plenty of air between them, so one US cup weighs only about 90 grams. Because the flakes settle, a cup you scoop straight after opening the bag can differ from one measured after the oats have compacted. For porridge the exact weight rarely matters, but in flapjacks, granola and oat cookies the ratio of oats to fat and sugar shapes the texture, so weighing helps.
Oats settle over time, so a fresh scoop and a settled one differ. Weigh for baking recipes.
Frequently asked questions
How many grams is 1 cup of rolled oats?
One US cup of rolled oats is about 90 grams. The flat flakes hold a lot of air, so oats are light for their volume.
Are quick oats the same weight as rolled oats?
Roughly. Quick oats are cut smaller and pack a little denser, so a cup can run slightly heavier, but 90 grams is a good working figure.
Does weighing oats matter for porridge?
Less so. For porridge you can eyeball it, but for granola, flapjacks and cookies the oats to fat ratio matters, so weighing pays off.