How Many Grams in a Cup of Rolled Oats?
1 cup = 90g · Tablespoon and teaspoon counts are US volume measures (16 tbsp and 48 tsp per cup). Spoon weights use this ingredient's density.
Quick values
- Cups
- 1
- Tablespoons
- 16
- Teaspoons
- 48
- Grams per tbsp
- 5.625g
- Grams per tsp
- 1.875g
- Grams
- 90
- Ounces
- 3.174659
- Pounds
- 0.198416
Rolled Oats cups to grams conversion table
| Cups | Tablespoons | Teaspoons | Grams | Ounces |
|---|---|---|---|---|
| 1/4 | 4 | 12 | 22.5g | 0.793665 |
| 1/3 | 5.333333 | 16 | 30g | 1.05822 |
| 1/2 | 8 | 24 | 45g | 1.58733 |
| 2/3 | 10.666667 | 32 | 60g | 2.116439 |
| 3/4 | 12 | 36 | 67.5g | 2.380994 |
| 1 | 16 | 48 | 90g | 3.174659 |
| 1.5 | 24 | 72 | 135g | 4.761989 |
| 2 | 32 | 96 | 180g | 6.349318 |
Each US tablespoon ≈ 5.625g · Each US teaspoon ≈ 1.875g
About Rolled Oats measurements
Rolled oats—also called old-fashioned oats—are steamed and flattened whole oat groats used in oatmeal, cookies, and granola. One US cup weighs approximately 90 grams when spooned and leveled. Quick oats and steel-cut oats differ: quick oats are finer and may pack slightly heavier; steel-cut oats are denser at roughly 160 grams per cup uncooked.
Spoon oats into a dry measuring cup without packing or shaking down, then level. Weighing 90 grams per cup ensures consistent oatmeal ratios and cookie chewiness. Do not confuse rolled oats with oat flour, which is ground finely and weighs about 92 grams per cup but behaves differently in baking.
Mistakes include using quick oats when recipes specify old-fashioned—the texture absorbs liquid differently though weight is similar. Substituting steel-cut oats in cookies without grinding them breaks teeth and weight ratios. Measuring oats packed like brown sugar adds excess dry matter and dries baked goods.
Store rolled oats in an airtight container up to one year at room temperature; longer in freezer. Prevent pantry moth infestation with sealed bins. Substitute quick oats at similar weight for texture changes, or process rolled oats briefly in a blender for homemade oat flour near 90 to 92 grams per cup ground.
Rolled oats at 90 grams per cup form the basis for oatmeal ratios, granola clumping, and cookie chewiness where excess dry oats absorb moisture from butter and eggs. Overnight oats recipes listing half-cup portions equal 45 grams by weight, simplifying batch prep for multiple jars. Oat milk and whole groats use different conversions entirely. When grinding oats for flour at home, start from weighed rolled oats rather than assuming ground volume equals wheat flour cups—behavior and hydration differ even when starting weight matches 90 grams per cup of whole flakes.
Energy bite recipes mixing oats with honey benefit from weighing both—90 grams oats per cup pairs with honey at 340 grams per cup for consistent bind without over-sweetening when cups are leveled inconsistently.
Frequently asked questions
One US cup of old-fashioned rolled oats equals 90 grams when spooned and leveled.
Spoon into a dry cup without packing and level, or weigh 90g. Do not scoop directly from the container.
Quick oats substitute at similar weight with softer texture. Steel-cut oats require cooking longer and weigh more per cup.
Keep in a sealed container in a cool, dry pantry or freezer. Use within 12 months for best flavor.