Hearty whole-grain flakes for oatmeal, granola, cookies, and crumble toppings.
1 cup = 89g
Rolled oats
Measured
lightly filled
Category
Grain
Rolled oats are whole oat groats that have been steamed and pressed flat, which shortens cooking time while keeping the whole grain intact. The flakes trap a lot of air, so a cup is light — about 89 grams — and settles noticeably if you pack it down.
They give chew and body to oatmeal, granola, cookies, and crumble toppings, and grind easily into gluten-free oat flour. Because flake size and packing change the volume, weigh when precision matters — 1 US cup is about 89g.
Data last verified: July 18, 2026
Old-fashioned, quick, and instant oats have different particle sizes and settle differently in a cup.
Pressing or shaking removes air gaps and makes the same cup of oats heavier.
lightly filled
Rolled (old-fashioned) oats
89g per cup
Steamed and flattened; the baking standard.
Quick oats
Rolled thinner and cut smaller, so they pack a bit denser.
Steel-cut oats
Whole groats chopped, not flattened — much denser per cup.
Instant oats
Pre-cooked and very thin; lightest per cup.
Oat flour
Oats ground to a powder for gluten-free baking.
These limited reference values are derived from the canonical cup weight. Use the converter for any other amount.
| Cups | Grams |
|---|---|
| ¼ cup | 22.3g |
| ⅓ cup | 29.7g |
| ½ cup | 44.5g |
| 1 cup | 89g |
Quick oats
Swap 1:1 for rolled oats; texture is softer and less chewy.
Oat flour
Blend rolled oats to a powder to replace some wheat flour.
1 US cup of rolled oats weighs about 89 grams. The flakes are light and airy, so weight is more reliable than a packed cup.
No. Steel-cut oats are dense chopped groats — about 180 grams per cup — roughly double rolled oats, so they aren't interchangeable by volume.
Usually yes, at a 1:1 ratio. Quick oats absorb liquid faster and bake softer, so cookies spread a little more and lose some chew.
Blend rolled oats in a food processor until powdery. About 1¼ cups of rolled oats yields roughly 1 cup of oat flour.