How many grams in a cup of oat flour?
1 cup of oat flour weighs 104 g.1 tablespoon: 6.5 g1 teaspoon: 2.2 g
Weights are for oat flour (unsifted), in US customary cups.
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= 104 g
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Cups to grams
| Cups | Grams |
|---|---|
| ⅛ cup | 13 g |
| ¼ cup | 26 g |
| ⅓ cup | 35 g |
| ½ cup | 52 g |
| ⅔ cup | 69 g |
| ¾ cup | 78 g |
| 1 cup | 104 g |
| 1 ½ cups | 156 g |
| 2 cups | 208 g |
| 3 cups | 312 g |
Grams to cups
| Grams | US measure |
|---|---|
| 25 g | 3 tbsp + 2 ½ tsp |
| 50 g | ≈ ½ cup |
| 100 g | ≈ ¾ cup + 3 tbsp |
| 150 g | 1 ¼ cups + 3 tbsp |
| 200 g | 1 ¾ cups + 3 tbsp |
| 250 g | ≈ 2 ⅜ cups |
| 500 g | 4 ¾ cups + 1 tbsp |
| 1,000 g | 9 ⅝ cups |
Rounded to amounts you can measure; ≈ marks a rounded answer.
Measuring oat flour
Store-bought oat flour. Oats ground at home are coarser and fill a cup differently, so weigh them if you can.
These weights are for oat flour (unsifted). A different form, or a cup filled another way, weighs differently, so weigh it if the recipe gives grams.
Source
USDA FoodData Central, food 169741: “Oat flour, partially debranned”, 1 cup = 104 g (USDA FoodData Central SR Legacy, April 2018). Other amounts are calculated with 1 cup = 16 tablespoons = 48 teaspoons. Data version 2026-10-17.2, reviewed 17 October 2026.
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