One-Third Cup of Oat Flour in Grams
1/3 cup of oat flour weighs 30.67g (1.08 oz, 80ml) according to USDA FoodData Central (1 cup oat flour = 92g, spooned and leveled method). 1/3 cup = 0.3333 of a full cup (240ml). See the full conversion table below for all amounts from 1 tablespoon to 3 cups.
Oat Flour Cup-to-Gram Conversion Table
Full range from 1 tablespoon to 3 cups. The highlighted row shows 1/3 cup.
| Amount | Grams |
|---|---|
| 1 tbsp | 5.75g |
| 2 tbsp | 11.5g |
| 1/8 cup | 11.5g |
| 1/4 cup | 23g |
| 1/3 cupthis page | 30.67g |
| 1/2 cup | 46g |
| 2/3 cup | 61.33g |
| 3/4 cup | 69g |
| 1 cup | 92g |
| 1 1/4 cups | 115g |
| 1 1/2 cups | 138g |
| 1 3/4 cups | 161g |
| 2 cups | 184g |
| 2 1/2 cups | 230g |
| 3 cups | 276g |
Source: USDA FoodData Central (FDC ID: 20038). 1 US cup = 240ml. Values use spooned-and-leveled method.
1/3 Cup of Different Ingredients — Weight Comparison
1/3 cup of different ingredients varies widely in weight because each has a different density. This matters when substituting ingredients in recipes.
| Ingredient | 1/3 Cup (g) |
|---|---|
| Rolled Oats | 30g |
| Oat Flourcurrent | 30.67g |
| Steel-Cut Oats | 53.33g |
All values use USDA FoodData Central spooned-and-leveled method. Click any ingredient to see its full conversion table.
Measuring Oat Flour Accurately
Why weight matters: 1/3 cup of oat flour can weigh anywhere from 26g to 37g depending on how you measure it. The USDA standard is 30.67g (spooned and leveled). Scooping directly from the container can add 10–20% extra weight, which affects recipe results — especially in baking.
About oat flour density: Oat flour is lighter than all-purpose flour. 1 cup = 92g. Can be made at home by blending rolled oats. Has a mild, slightly sweet flavor. Good for pancakes, muffins.
About 1/3 Cup as a Measurement
1/3 cup = 5 tablespoons + 1 teaspoon = 80ml. This unusual fraction appears in recipes that scale for 2 servings from a 3-serving base. It cannot be made from combining standard 1/4 and 1/8 cup measures without error.
One-third cup is common in yogurt parfait recipes, small-batch granola bars, and single-layer cake recipes scaled for 2 servings. It is exactly 80ml in metric volume.
Frequently Asked Questions
How many grams is 1/3 cup of oat flour?
1/3 cup of oat flour weighs 30.67 grams (1.08 oz, 80ml). Based on USDA FoodData Central: 1 cup oat flour = 92g, so 1/3 cup = 92 × 0.333 = 30.67g.
Is 1/3 cup of oat flour the same weight every time?
The weight can vary slightly depending on measuring technique. Spooned and leveled gives 30.67g. Scooped (packed) can be 10–20% heavier. Sifted gives a lighter weight. The USDA standard (spooned and leveled) of 30.67g is the most reliable baseline for recipes.
How do I accurately measure 1/3 cup of oat flour?
For accuracy, use a kitchen scale and weigh 30.67g of oat flour. If using measuring cups, spoon the oat flour lightly into a 1/3 Cup measuring cup and level off the top with a straight edge. Avoid scooping directly from the container, which compacts the ingredient and adds extra weight.
How does 1/3 cup of oat flour compare to other ingredients?
1/3 cup of different ingredients varies significantly: Rolled Oats = 30g, Oat Flour = 30.67g, Steel-Cut Oats = 53.33g. This is because each ingredient has a different density.