Convert Rolled Oats from Teaspoon to Cup (US)

How many US cups is 1 teaspoon of rolled oats?

1 teaspoon of rolled oats (oatmeal) is 0.02 US cups. 2 teaspoons of rolled oats is 0.04 US cups. Use the converter below for any amount.

  • These figures use the US cup (240 ml). A metric cup is slightly larger at 250 ml, so it holds a little more. Use the metric 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 →
  • A teaspoon here is the 5 ml standard, the same in the UK, Europe, and Australia. A US teaspoon is fractionally smaller at about 4.9 ml. When teaspoon size matters →
  • A little over or under won't ruin the bake, though it can nudge the final taste or colour.

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 Cup (US)

Common Rolled Oats Conversions

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

TeaspoonsCups (US)
0.25 tsp0.01 cups (US)
0.5 tsp0.01 cups (US)
1 tsp0.02 cups (US)
2 tsp0.04 cups (US)
3 tsp0.06 cups (US)
4 tsp0.08 cups (US)
6 tsp0.13 cups (US)
8 tsp0.17 cups (US)
12 tsp0.25 cups (US)

Rolled Oats Conversion Chart

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

tspcup(US)cupgramsouncestbsp
1 tsp0.02 cup (US)0.02 cup1.8 g0.06 oz0.33 tbsp
2 tsp0.04 cup (US)0.04 cup3.6 g0.13 oz0.67 tbsp
3 tsp0.06 cup (US)0.06 cup5.4 g0.19 oz1 tbsp
4 tsp0.08 cup (US)0.08 cup7.2 g0.25 oz1.33 tbsp

Frequently Asked Questions

How many US cups is 1 teaspoon of rolled oats?
1 teaspoon of rolled oats is 0.02 US cups. The ratio is fixed, so 2 teaspoons of rolled oats is 0.04 US cups and 0.5 teaspoons is 0.01 US cups. 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 US cups is 1.5 teaspoons of rolled oats?
1.5 teaspoons of rolled oats is 0.03 US cups. The ratio is fixed, so 1 teaspoon of rolled oats is 0.02 US cups and 2 teaspoons is 0.04 US cups. Type any other amount into the converter above for the exact figure, or use the chart below for the common ones.
How many US cups is 2 teaspoons of rolled oats?
2 teaspoons of rolled oats is 0.04 US cups. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 teaspoon of rolled oats is 0.02 US cups, and you can multiply or divide that figure to match whatever your recipe needs. Enter any amount in the converter above for an exact US cups reading.
How many teaspoons of rolled oats is 0.02 US cups?
0.02 US cups of rolled oats is 0.96 teaspoons. The conversion works the same in reverse, so you can switch between US cups and teaspoons without changing the result. This helps when a recipe lists teaspoons but you would rather weigh or measure in US cups. The converter above and the chart below cover both directions for any amount.
How many US cups is 1 teaspoon of oatmeal?
Oatmeal is another name for rolled oats, so 1 teaspoon of oatmeal is 0.02 US cups, exactly the same as rolled oats. The figure does not change with the name: 2 teaspoons is 0.04 US cups and 0.5 teaspoons is 0.01 US cups. Use the converter above for any quantity, or read the conversion chart on this page for the most common amounts.

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