Grains, Rice & Legumes
Convert teaspoons of rolled oats to grams
One teaspoon of rolled oats weighs about 1.88 g, and half a teaspoon comes to roughly 0.938 g. Enter any amount below to convert it, or use the chart further down as a quick reference while you cook.
1 tsp of rolled oats =
1.88 g
- oz
- 0.066
- kg
- 0.0019
- lb
- 0.0041
Rolled Oats: 90 g per US cup · USDA FoodData Central. Old-fashioned rolled oats. Quick oats are cut smaller and measure closer to 100 g per cup.
Full rolled oats chart →Rolled Oats at a glance
Every number on this page comes from a single figure: 90 grams per US cup (USDA FoodData Central).
- 1 cup
- 90 g
- 1 tablespoon
- 5.63 g
- 1 teaspoon
- 1.88 g
- 1 cup in ounces
- 3.17 oz
- 100 g in cups
- 1.11 cups
- Density
- 0.38 g/ml
teaspoons to grams chart for rolled oats
Print it, screenshot it, or bookmark this page — these are the amounts recipes ask for most often.
| Teaspoons (US) | Grams | Ounces (weight) | Pounds |
|---|---|---|---|
| 1/4 tsp | 0.469 g | 0.017 oz | 0.0010 lb |
| 1/2 tsp | 0.938 g | 0.033 oz | 0.0021 lb |
| 3/4 tsp | 1.41 g | 0.05 oz | 0.0031 lb |
| 1 tsp | 1.88 g | 0.066 oz | 0.0041 lb |
| 1 1/2 tsp | 2.81 g | 0.099 oz | 0.0062 lb |
| 2 tsp | 3.75 g | 0.132 oz | 0.0083 lb |
| 3 tsp | 5.63 g | 0.198 oz | 0.012 lb |
| 4 tsp | 7.5 g | 0.265 oz | 0.017 lb |
| 6 tsp | 11.3 g | 0.397 oz | 0.025 lb |
| 8 tsp | 15 g | 0.529 oz | 0.033 lb |
How this conversion is calculated
Volume-to-weight conversions are only as good as the density behind them. We treat rolled oats as 90 g per US customary cup, which works out to 0.380 g/ml. From there:
- Your teaspoons figure is converted into millilitres or grams using standard unit sizes (tsp = 4.93 ml).
- The density above bridges volume and weight in whichever direction you need.
- The result is rounded the way a cook would round it — to the nearest gram, or to a usable fraction such as 1 1/8 cups.
Measuring rolled oats accurately
Old-fashioned rolled oats. Quick oats are cut smaller and measure closer to 100 g per cup.
If a recipe matters to you — bread, macarons, anything with a tight hydration or ratio — weigh it. A £10 digital scale removes the single largest source of variation in home baking, and it is faster than washing three measuring cups.
When cups are fine
- Liquids measured in a proper jug, where volume is the honest unit anyway.
- Forgiving savoury cooking: soups, stews, stir-fries, marinades.
- Small amounts of leaveners and spices, as long as you use level spoons.
Frequently asked questions
How many grams are in 1 teaspoon of rolled oats?
1 teaspoon of rolled oats is 1.88 g. This is based on a density of 90 g per US cup.
How many grams are in 2 teaspoons of rolled oats?
2 teaspoons of rolled oats is 3.75 g, and 0.938 g for half a teaspoon.
How much is 100 g of rolled oats in cups?
100 g of rolled oats is about 1 1/8 cups. Weight is always the more reliable measurement, so use a scale when the recipe gives grams.
Why do other sites give a different number for rolled oats?
Old-fashioned rolled oats. Quick oats are cut smaller and measure closer to 100 g per cup.
Do UK and Australian cups give the same result?
No. A US customary cup is 236.6 ml, a metric cup used in Australia and New Zealand is 250 ml, and an old UK imperial cup is 284 ml. Our default is the US cup, but you can pick metric cups in the converter.