1 Cup Dry Old-Fashioned Rolled Oats (90g) = 2 cups Cooked
1 US cup (90 grams) of uncooked old-fashioned rolled oats yields 2 cups (468 grams) cooked after standard stove-top preparation in water or broth—a verified 2× volume expansion and 5.2× weight multiplier providing roughly 2 standard cooked servings.
Bring water or milk to a boil, stir in rolled oats and a pinch of salt, reduce to medium-low, and simmer for 5 minutes stirring occasionally until creamy.
Method note: Bring water or milk to a boil, stir in rolled oats and a pinch of salt, reduce to medium-low, and simmer for 5 minutes stirring occasionally until creamy.
Old-Fashioned Rolled Oats Batch Yield Reference Chart
| Uncooked (dry) | Uncooked Grams | Cooked Volume | Cooked Weight | Est. Servings |
|---|---|---|---|---|
| ½ cup | 45 g | 1 cup | 234 g (8.25 oz) | ~1 |
| 1 cup | 90 g | 2 cups | 468 g (16.51 oz) | ~2 |
| 1 ½ cups | 135 g | 3 cups | 702 g (24.76 oz) | ~3 |
| 2 cups | 180 g | 4 cups | 936 g (33.02 oz) | ~4 |
| 3 cups | 270 g | 6 cups | 1404 g (49.52 oz) | ~6 |
Frequently Asked Questions
How much cooked oatmeal does 1 cup dry rolled oats yield? ▾
1 cup (90g) of dry rolled oats simmered with 2 cups of liquid yields approximately 2 cups (~468g total, or ~234g per cooked cup) of warm, creamy oatmeal.
What is the standard liquid-to-rolled-oats ratio? ▾
The classic ratio is 2 parts water or milk to 1 part rolled oats by volume for a balanced, spoonable porridge consistency.