Oat flour serving size, cups to grams
Here a serving of oat flour is counted as 1/4 cup. By the USDA weight of 1 cup (104 g) that is 0.9 oz (26 g), with 105 calories and 3.8 g protein. One cup weighs 3.7 oz (104 g) and one tablespoon 6.5 g.
Serving sizes of oat flour
Every household measure USDA weighs for this food, plus 1 oz and 100 g.
| Measure | Weight | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|---|
| 1 cup | 3.7 oz (104 g) | 420 calories | 15.2 g | 68.3 g | 9.5 g |
| 1 oz | 1 oz (28 g) | 115 calories | 4.2 g | 18.6 g | 2.6 g |
| 100 g | 3.5 oz (100 g) | 404 calories | 14.7 g | 65.7 g | 9.1 g |
Cups to grams
USDA weighs 1 cup of oat flour at 104 g. Smaller measures follow from it (1 cup = 16 tbsp = 48 tsp).
| Measure | Weight | Calories |
|---|---|---|
| 1 cup | 3.7 oz (104 g) | 420 calories |
| 3/4 cup | 2.8 oz (78 g) | 315 calories |
| 2/3 cup | 2.4 oz (69 g) | 280 calories |
| 1/2 cup | 1.8 oz (52 g) | 210 calories |
| 1/3 cup | 1.2 oz (35 g) | 140 calories |
| 1/4 cup | 0.9 oz (26 g) | 105 calories |
| 1 tbsp | 6.5 g | 26 calories |
| 1 tsp | 2.2 g | 9 calories |
Grams and ounces to cups
| Weight | Volume | Calories |
|---|---|---|
| 1 oz | 1/4 cup | 115 calories |
| 100 g (3.5 oz) | 1 cup | 404 calories |
| 1 lb (454 g) | 4 1/3 cups | 1833 calories |
What 3.5 oz (100 g) of oat flour looks like
3.5 oz (100 g) of oat flour is 3.5 oz, or about 1 cup. It has 404 calories, 14.7 g protein, 65.7 g carbs and 9.1 g fat.
Keep exploring
Sources
Weights and nutrition: USDA FoodData Central, food portions and nutrients (FoodData Central, April 2026 release, accessed 2026-10-14)
- Oat flour (partially debranned): Oat flour, partially debranned, FDC ID 169741 (SR Legacy, published 2019-04-01) · full nutrition facts
- Kitchen measures (1 cup = 16 tbsp, 1 tbsp = 3 tsp): NDSU Extension, Ingredient Substitutions (FN198, J. Garden-Robinson, April 2013 edition). https://www.extension.purdue.edu/extmedia/HHS/HHS-784-W.pdf (accessed 2026-10-12)
How we calculate: each household measure is the gram weight USDA lists for this food. Calories and nutrients are the USDA values per 3.5 oz (100 g) scaled to that weight. 1 oz = 28.35 g and 1 lb = 453.6 g. Cup fractions are rounded to the nearest kitchen measure. A dash (—) means USDA reports no value. How we verify.