how many grams in a cup of oats?

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things people ask

• How many grams in a cup of rolled oats?
  About 113 g for old-fashioned rolled oats, spooned into the cup and leveled. If you scoop straight from the canister the flakes can compress slightly and push the cup closer to 120 g, which is enough to throw off a granola ratio where oats meet a fixed amount of oil and syrup. For cookies the variance matters less, but weighing is the cleanest call.
• Are rolled, quick, and steel-cut oats interchangeable by the cup?
  By volume, no. Quick oats are smaller flakes and weigh roughly 90-100 g per cup. Steel-cut oats are unrolled groats and weigh closer to 170 g per cup, and they don't soften the same way in baking. Swap rolled for quick in cookies and you'll get a softer, less chewy texture; swap in steel-cut and the dough won't hydrate properly.
• How much uncooked oats makes one bowl of porridge?
  Half a cup of rolled oats — about 57 g — is the standard single serving and roughly doubles in volume once cooked with a cup of water or milk. Overnight oats use the same 1/2 cup base with equal liquid, refrigerated. Scaling for a family of four means 2 cups (226 g) of oats and 4 cups of liquid in one pot.

related conversions

• Oats: tablespoons to grams
• Oats: teaspoons to grams
• Oats guide