Flours & Starches
Convert ounces of oat flour to cups
One ounce of oat flour weighs about 0.322 cup, and half a ounce comes to roughly 0.161 cup. Enter any amount below to convert it, or use the chart further down as a quick reference while you cook.
1 oz of oat flour =
0.322 cup
About 1/3 cup in recipe notation
- ml
- 76.2
- tbsp
- 5.15
Oat Flour: 88 g per US cup · USDA FoodData Central. Home-ground oat flour is fluffier than commercial flour. Weigh it if you blend your own oats.
Full oat flour chart →Oat Flour at a glance
Every number on this page comes from a single figure: 88 grams per US cup (USDA FoodData Central).
- 1 cup
- 88 g
- 1 tablespoon
- 5.5 g
- 1 teaspoon
- 1.83 g
- 1 cup in ounces
- 3.1 oz
- 100 g in cups
- 1.14 cups
- Density
- 0.37 g/ml
ounces to cups chart for oat flour
Print it, screenshot it, or bookmark this page — these are the amounts recipes ask for most often.
| Ounces (weight) | Cups (US) | Tablespoons (US) | Millilitres |
|---|---|---|---|
| 0.5 oz | 0.161 cup | 2.58 tbsp | 38.1 ml |
| 1 oz | 0.322 cup | 5.15 tbsp | 76.2 ml |
| 2 oz | 0.644 cup | 10.3 tbsp | 152 ml |
| 3 oz | 0.966 cup | 15.5 tbsp | 229 ml |
| 4 oz | 1.29 cup | 20.6 tbsp | 305 ml |
| 5 oz | 1.61 cup | 25.8 tbsp | 381 ml |
| 6 oz | 1.93 cup | 30.9 tbsp | 457 ml |
| 8 oz | 2.58 cup | 41.2 tbsp | 610 ml |
| 12 oz | 3.87 cup | 61.9 tbsp | 915 ml |
| 16 oz | 5.15 cup | 82.5 tbsp | 1219 ml |
How this conversion is calculated
Volume-to-weight conversions are only as good as the density behind them. We treat oat flour as 88 g per US customary cup, which works out to 0.372 g/ml. From there:
- Your ounces figure is converted into millilitres or grams using standard unit sizes (oz = 28.3 g).
- The density above bridges volume and weight in whichever direction you need.
- The result is rounded the way a cook would round it — to the nearest gram, or to a usable fraction such as 1 1/8 cups.
Measuring oat flour accurately
Home-ground oat flour is fluffier than commercial flour. Weigh it if you blend your own oats.
If a recipe matters to you — bread, macarons, anything with a tight hydration or ratio — weigh it. A £10 digital scale removes the single largest source of variation in home baking, and it is faster than washing three measuring cups.
When cups are fine
- Liquids measured in a proper jug, where volume is the honest unit anyway.
- Forgiving savoury cooking: soups, stews, stir-fries, marinades.
- Small amounts of leaveners and spices, as long as you use level spoons.
Frequently asked questions
How many cups are in 1 ounce of oat flour?
1 ounce of oat flour is 0.322 cup. This is based on a density of 88 g per US cup.
How many cups are in 2 ounces of oat flour?
2 ounces of oat flour is 0.644 cup, and 0.161 cup for half a ounce.
How much is 100 g of oat flour in cups?
100 g of oat flour is about 1 1/8 cups. Weight is always the more reliable measurement, so use a scale when the recipe gives grams.
Why do other sites give a different number for oat flour?
Home-ground oat flour is fluffier than commercial flour. Weigh it if you blend your own oats.
Do UK and Australian cups give the same result?
No. A US customary cup is 236.6 ml, a metric cup used in Australia and New Zealand is 250 ml, and an old UK imperial cup is 284 ml. Our default is the US cup, but you can pick metric cups in the converter.