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Cooking conversion
Ounces of Rolled Oats to Cups
How many cups of rolled oats are in a given weight? Type a number of ounces below to see the volume. Math uses rolled oats's density of 0.385 g/mL.
Calculator
100 oz of rolled oats = 31.1238 cup
Ounces of Rolled Oats to Cups Conversion Table
Common values for rolled oats:
| Ounces of rolled oats | Cups |
|---|---|
| 10 oz | 3.1124 cup |
| 25 oz | 7.7809 cup |
| 50 oz | 15.5619 cup |
| 100 oz | 31.1238 cup |
| 150 oz | 46.6857 cup |
| 200 oz | 62.2476 cup |
| 250 oz | 77.8094 cup |
| 500 oz | 155.62 cup |
| 1000 oz | 311.24 cup |
How this works
Rolled oats has a density of about 0.385 g/mL (king arthur baking: 1 cup = 91g). That means 1 mL of rolled oats weighs 0.385 grams.
Cups = ounces × 0.3112
Note: Old-fashioned rolled oats. Quick oats are slightly denser (~0.41).
Why a cup of rolled oats doesn't always weigh the same
Volume measurements are forgiving in some ways and brutal in others. A cup of rolled oats can vary by 10-20% in weight depending on how it's measured: spooned vs scooped, packed vs loose, sifted vs unsifted. The density figure used here matches the most common published recipe conventions, but if you're after baking precision, weighing on a kitchen scale is more accurate than measuring by volume.