How Much Is 4 Cups of Rolled Oats in Ounces?
4 cups of rolled oats equals 12.70 oz. Rolled oats has a density of 90g per cup (90g per cup), which means it's relatively light compared to other common cooking ingredients. For comparison, 4 cups of honey would be 47.97 oz.
Formula and Step-by-Step
- Start with 4 cups of rolled oats
- 1 cup of rolled oats = 90g
- 4 × 90 = 360g
- Convert grams to ounces: 360 ÷ 28.3495 = 12.70 oz
The same formula works for any amount. Multiply (or divide) by the density, then convert units as needed.
Measuring Tip
Uncooked and cooked grains have completely different weights per cup. These conversions are for uncooked/dry grains unless specified otherwise.
Rolled Oats at Different Amounts
How rolled oats scales across common cups measurements. Your amount (4 cups) is highlighted.
For reference, 4 cups of rolled oats (360g) is close in weight to a can of soda (355g).
Other Amounts of Rolled Oats
| Cups | US Ounces | Metric Cup | Imperial Cup |
|---|---|---|---|
| 0.25 cups | 0.79 oz | 0.84 oz | 0.95 oz |
| 0.33 cups | 1.05 oz | 1.11 oz | 1.26 oz |
| 0.5 cups | 1.59 oz | 1.68 oz | 1.91 oz |
| 0.75 cups | 2.38 oz | 2.52 oz | 2.86 oz |
| 1 cup | 3.17 oz | 3.35 oz | 3.81 oz |
| 1.5 cups | 4.76 oz | 5.03 oz | 5.72 oz |
| 2 cups | 6.35 oz | 6.71 oz | 7.63 oz |
| 3 cups | 9.52 oz | 10.06 oz | 11.44 oz |
| 4 cups | 12.70 oz | 13.42 oz | 15.25 oz |
| 5 cups | 15.87 oz | 16.77 oz | 19.06 oz |
Understanding the Units
What is a Cup?
A cup is a US customary unit of volume equal to 236.588 milliliters or 8 fluid ounces. It is the most common volume measurement in American recipes. One cup can be divided into 16 tablespoons or 48 teaspoons.
What is an Ounce?
An ounce (oz) is a US customary unit of weight equal to 28.3495 grams or 1/16 of a pound. In cooking, "ounces" refers to weight (avoirdupois ounces), not fluid ounces which measure volume.