Oats Cups to Grams Converter
Convert cups of oats to grams for rolled, quick, steel-cut and instant oats.
Results
Oats vary significantly in weight per cup depending on type. Rolled oats weigh about 90g per cup, quick oats pack slightly tighter at 80g per cup, and steel-cut oats are much denser at 160g per cup. Getting the measurement right matters for porridge consistency and baking texture - using steel-cut oat measurements for a recipe calling for rolled oats doubles the amount of oats.
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Frequently asked questions
1 cup of rolled (old-fashioned) oats weighs approximately 90 grams. This is about 2.25 standard porridge servings (40g each).
1 cup of steel-cut oats weighs about 160 grams - nearly double rolled oats because the dense, chopped pieces pack together more tightly.
Yes, by weight they are interchangeable. By volume, use slightly more quick oats since they weigh less per cup (80g vs 90g for rolled).
100g of rolled oats is about 1.1 cups. For quick oats, 100g is about 1.25 cups. A standard porridge serving is 40g (about 1/2 cup rolled).
A standard overnight oats portion is 40-50g (about 1/2 cup) of rolled oats. Combined with liquid and toppings, this makes a filling breakfast.