Convert Rolled Oats from Cup to Grams

How many grams is 1 cup of rolled oats?

1 cup of rolled oats (oatmeal) is 90 grams. 2 cups of rolled oats is 180 grams. Use the converter below for any amount.

  • These figures use the metric cup (250 ml). A US cup is slightly smaller at 240 ml, so it holds a little less. Use the US cup converter →
  • Cup sizes are not standard worldwide, so the same cup of an ingredient can weigh more or less depending on the country. What is a cup measurement →

Rolled oats are whole oat groats that have been steamed and flattened into flakes (quicker to prepare than steel-cut oats, which are coarsely chopped and take 20–30 minutes to cook) and chewier in texture than quick oats (which are rolled thinner for a 1–2 minute cook time). One metric cup (250 ml) of rolled oats weighs approximately 90 grams or 3.17 ounces. They are widely used in porridge, granola, baked goods such as oat cookies and crumbles, and as a breadcrumb substitute.

Oats are often sold by weight but measured by volume in baking recipes — getting the conversion right prevents dense or dry results. Measuring by weight is especially important as oats compress easily, making cup measures inconsistent.

Also known as

  • oatmeal
  • porridge oats
  • old-fashioned oats

Desiccated coconut works alongside oats in granola, flapjacks, and crumble toppings, adding sweetness and a fine crunch where oats give chew. They are close in weight (88 g vs 90 g per cup), so weigh rather than scoop when the ratio matters. See our Desiccated Coconut converter.

No measuring cups? The tool below gets you close. For consistent results, grab a measuring cup set.

Rolled Oats Measurement Converter

Enter a value and pick your units.

Result

0 Grams

Common Rolled Oats Conversions

Here are the most common rolled oats conversions from cups to grams.

CupsGrams
0.25 cups22.5 g
0.5 cups45 g
0.75 cups67.5 g
1 cup90 g
1.25 cups112.5 g
1.5 cups135 g
2 cups180 g
2.5 cups225 g
3 cups270 g

Rolled Oats Conversion Chart

The conversion chart below gives a quick reference for converting rolled oats from Cup to Grams and other measurements.

cupgramsouncescup(US)tbsptsp
0.25 cup22.5 g0.79 oz0.26 cup (US)4.17 tbsp12.5 tsp
0.5 cup45 g1.59 oz0.52 cup (US)8.33 tbsp25 tsp
1 cup90 g3.17 oz1.04 cup (US)16.67 tbsp50 tsp
2 cup180 g6.34 oz2.08 cup (US)33.33 tbsp100 tsp

Frequently Asked Questions

How many grams is 1 cup of rolled oats?
1 cup of rolled oats is 90 grams. The ratio is fixed, so 2 cups of rolled oats is 180 grams and 0.5 cups is 45 grams. Use the converter above for any quantity, or check the conversion chart on this page for the most common amounts at a glance. Open the rolled oats converter
How many grams is 1.5 cups of rolled oats?
1.5 cups of rolled oats is 135 grams. The ratio is fixed, so 1 cup of rolled oats is 90 grams and 2 cups is 180 grams. Type any other amount into the converter above for the exact figure, or use the chart below for the common ones.
How many grams is 2 cups of rolled oats?
2 cups of rolled oats is 180 grams. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 cup of rolled oats is 90 grams, and you can multiply or divide that figure to match whatever your recipe needs. Enter any amount in the converter above for an exact grams reading.
How many cups of rolled oats is 90 grams?
90 grams of rolled oats is 1 cup. The conversion works the same in reverse, so you can switch between grams and cups without changing the result. This helps when a recipe lists cups but you would rather weigh or measure in grams. The converter above and the chart below cover both directions for any amount.
How many grams is 1 cup of oatmeal?
Oatmeal is another name for rolled oats, so 1 cup of oatmeal is 90 grams, exactly the same as rolled oats. The figure does not change with the name: 2 cups is 180 grams and 0.5 cups is 45 grams. Use the converter above for any quantity, or read the conversion chart on this page for the most common amounts.

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