Convert Oat Flour from Ounces to Cup (US)

How many US cups is 1 ounce of oat flour?

1 ounce of oat flour (ground oats) is 0.3 US cups. 2 ounces of oat flour is 0.59 US cups. 4 ounces of oat flour is 1.18 US cups. 6 ounces of oat flour is 1.77 US cups. Use the converter below for any amount.

Oat flour is made from finely ground rolled oats, giving it a mild, slightly nutty flavour and a naturally gluten-free composition when certified gluten-free oats are used. One metric cup (250 ml) of oat flour weighs approximately 100 grams or 3.53 ounces. It is commonly used in pancakes, muffins, cookies, and quick breads as a wholesome substitute for plain flour.

Oat flour is much lighter and less dense than plain flour, so substituting by volume rather than weight leads to significant differences in texture and structure. Weighing oat flour in grams ensures consistent, reliable results across recipes.

Also known as

  • ground oats
  • oatmeal flour
  • blended oats

Related Oat Flour Ingredients

Oat flour is rolled oats milled to a powder, so the two are close in weight (100 g vs 90 g per cup). Blitz rolled oats in a blender to make your own oat flour, or weigh the flour when a recipe needs the fine, ready-ground form. See what 1 ounce of rolled oats is in US cups.

Out of oat flour? See oat flour substitutes →

No scale? The tool below gives a good estimate, but for exact bakes a digital kitchen scale removes the guesswork.

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Oat Flour Measurement Converter

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Result

0.3 Cup (US)

Oat Flour Calculators & Baking Tools

Working with oat flour? These tools handle the jobs a converter cannot.

Common Oat Flour Conversions

Here are the most common oat flour conversions from ounces to cups (US).

OuncesCups (US)
1 oz0.3 cups (US)
2 oz0.59 cups (US)
3 oz0.89 cups (US)
4 oz1.18 cups (US)
5 oz1.48 cups (US)
6 oz1.77 cups (US)
8 oz2.36 cups (US)
10 oz2.95 cups (US)
12 oz3.54 cups (US)

Oat Flour Conversion Chart

The conversion chart below gives a quick reference for converting oat flour from Ounces to Cup (US) and other measurements.

ouncescup(US)cupgramslbkgtbsptsp
2.5 oz0.74 cup (US)0.71 cup70.82 g0.16 lb0.07 kg11.8 tbsp35.41 tsp
5 oz1.48 cup (US)1.42 cup141.64 g0.31 lb0.14 kg23.61 tbsp70.82 tsp
7.5 oz2.21 cup (US)2.12 cup212.46 g0.47 lb0.21 kg35.41 tbsp106.23 tsp
10 oz2.95 cup (US)2.83 cup283.29 g0.62 lb0.28 kg47.21 tbsp141.64 tsp

For the reverse conversion, see 1 US cup of oat flour in ounces.

Frequently Asked Questions

How many US cups is 1 ounce of oat flour?
1 ounce of oat flour is 0.3 US cups. The conversion is fixed, so 2 ounces is 0.59 US cups and 4 ounces is 1.18 US cups. These whole-ounce amounts are the ones recipes call for most with bulk ingredients, and the figure scales in a straight line as you multiply or divide. Use the converter above for any other amount, or the conversion chart on this page for the common ones. Open the oat flour converter
How many US cups is 2 ounces of oat flour?
2 ounces of oat flour is 0.59 US cups. The conversion is fixed, so 1 ounce is 0.3 US cups and 4 ounces is 1.18 US cups. These whole-ounce amounts are the ones recipes call for most with bulk ingredients, and the figure scales in a straight line as you multiply or divide. Use the converter above for any other amount, or the conversion chart on this page for the common ones.
What is 4 oz oat flour in US cups?
4 ounces of oat flour is 1.18 US cups. The conversion is fixed, so 1 ounce is 0.3 US cups and 2 ounces is 0.59 US cups. These whole-ounce amounts are the ones recipes call for most with bulk ingredients, and the figure scales in a straight line as you multiply or divide. Use the converter above for any other amount, or the conversion chart on this page for the common ones.
What is 6 oz oat flour in US cups?
6 ounces of oat flour is 1.77 US cups. The conversion is fixed, so 1 ounce is 0.3 US cups and 2 ounces is 0.59 US cups. These whole-ounce amounts are the ones recipes call for most with bulk ingredients, and the figure scales in a straight line as you multiply or divide. Use the converter above for any other amount, or the conversion chart on this page for the common ones.
Are oat flour and ground oats the same thing?
Yes. Ground oats is another name for oat flour, so they are the same ingredient and convert identically. 1 ounce of oat flour is 0.3 US cups under either name, and 2 ounces is 0.59 US cups. Recipes use the two names interchangeably, so you can follow either one without changing quantities or weighing any differently.

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