How Much Is 64 Ounces of Rolled Oats in Cups?
64 ounces of rolled oats equals 20.16 cups. Rolled oats has a density of 90g per cup. A lighter ingredient like cocoa powder (86g/cup) would fill even more volume at the same weight, which is why ingredient-specific conversions matter.
Formula and Step-by-Step
- Start with 64 ounces of rolled oats
- Convert ounces to grams: 64 × 28.35 = 1,814.37g
- 1 cup of rolled oats = 90g
- 1,814.37g ÷ 90g/cup = 20.16 cups
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 ounces measurements. Your amount (64 ounces) is highlighted.
Other Amounts of Rolled Oats
| Ounces | US Cups | Metric Cup | Imperial Cup |
|---|---|---|---|
| 1 ounce | 0.31 cups | 0.30 cups | 0.26 cups |
| 2 ounces | 0.63 cups | 0.60 cups | 0.52 cups |
| 3 ounces | 0.94 cups | 0.89 cups | 0.79 cups |
| 4 ounces | 1.26 cups | 1.19 cups | 1.05 cups |
| 5 ounces | 1.57 cups | 1.49 cups | 1.31 cups |
| 6 ounces | 1.89 cups | 1.79 cups | 1.57 cups |
| 8 ounces | 2.52 cups | 2.38 cups | 2.10 cups |
| 10 ounces | 3.15 cups | 2.98 cups | 2.62 cups |
| 12 ounces | 3.78 cups | 3.58 cups | 3.15 cups |
| 16 ounces | 5.04 cups | 4.77 cups | 4.20 cups |
| 64 ounces | 20.16 cups | 19.08 cups | 16.79 cups |
Understanding the Units
What is an Ounce?
Ounces are commonly used in US recipes for cheese, meat, chocolate, and other ingredients sold by weight. Many kitchen scales offer both gram and ounce readings.
What is a Cup?
There are three cup standards used worldwide. The US cup (236.588 ml) is used in American recipes. The metric cup (250 ml) is standard in Australia, New Zealand, and some parts of Asia. The imperial cup (284.131 ml) appears in older British and Canadian recipes. A metric cup holds about 5.7% more than a US cup, while an imperial cup holds about 20% more. Using the wrong standard can noticeably affect a recipe.