Convert Rolled Oats from Cup (US) to Grams

How many grams is 1 US cup of rolled oats?

1 US cup of rolled oats (oatmeal) is 86.4 grams. 2 US cups of rolled oats is 172.8 grams. Use the converter below for any amount.

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

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0 Grams

Common Rolled Oats Conversions

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

Cups (US)Grams
0.25 cups (US)21.6 g
0.5 cups (US)43.2 g
0.75 cups (US)64.8 g
1 cup (US)86.4 g
1.25 cups (US)108 g
1.5 cups (US)129.6 g
2 cups (US)172.8 g
2.5 cups (US)216 g
3 cups (US)259.2 g

Rolled Oats Conversion Chart

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

cup(US)gramscupouncestbsptsp
0.25 cup (US)21.6 g0.24 cup0.76 oz4 tbsp12 tsp
0.5 cup (US)43.2 g0.48 cup1.52 oz8 tbsp24 tsp
1 cup (US)86.4 g0.96 cup3.04 oz16 tbsp48 tsp
2 cup (US)172.8 g1.92 cup6.09 oz32 tbsp96 tsp

Frequently Asked Questions

How many grams is 1 US cup of rolled oats?
1 US cup of rolled oats is 86.4 grams. The ratio is fixed, so 2 US cups of rolled oats is 172.8 grams and 0.5 US cups is 43.2 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 US cups of rolled oats?
1.5 US cups of rolled oats is 129.6 grams. The ratio is fixed, so 1 US cup of rolled oats is 86.4 grams and 2 US cups is 172.8 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 US cups of rolled oats?
2 US cups of rolled oats is 172.8 grams. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 US cup of rolled oats is 86.4 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 US cups of rolled oats is 86.4 grams?
86.4 grams of rolled oats is 1 US cup. The conversion works the same in reverse, so you can switch between grams and US cups without changing the result. This helps when a recipe lists US 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 US cup of oatmeal?
Oatmeal is another name for rolled oats, so 1 US cup of oatmeal is 86.4 grams, exactly the same as rolled oats. The figure does not change with the name: 2 US cups is 172.8 grams and 0.5 US cups is 43.2 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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