Convert Oat Bran — Cups, Grams & Ounces
Oat Bran weighs 94 g per US cup — so a recipe in cups and a recipe in grams can be swapped either way. 100 g is 1 1/8 cups, and 2 cups is 188 g.
💡 Tip: Oat bran is the fibre-rich outer layer of the oat groat — finer than rolled oats and not the same as oatmeal. Stir it into porridge, smoothies or batter.
How many grams in a cup of oat bran?
| Cups | Grams | Ounces |
|---|---|---|
| 1/4 | 23.5 | 0.83 |
| 1/3 | 31.3 | 1.11 |
| 1/2 | 47 | 1.66 |
| 2/3 | 62.7 | 2.21 |
| 3/4 | 70.5 | 2.49 |
| 1 | 94 | 3.32 |
| 1 1/2 | 141 | 4.97 |
| 2 | 188 | 6.63 |
| 2 1/2 | 235 | 8.29 |
| 3 | 282 | 9.95 |
| 4 | 376 | 13.3 |
Oat bran vs oatmeal and oat flour
Oat bran is the fibre-rich outer layer of the oat groat, milled to a soft, fluffy texture that weighs about 94 g per cup. It's not the same as oatmeal (whole rolled oats) or oat flour (the whole oat ground to powder) — oat bran is just the bran, so it's higher in soluble fibre and cooks down softer. It makes a quick, creamy hot cereal in a few minutes, and a spoonful stirs easily into smoothies, yoghurt, muffin batter or meatballs.
In baking it can usually replace up to about a quarter of the flour for extra fibre without weighing the crumb down too much.
Converting grams of oat bran back to cups
| Grams | Amount | Ounces |
|---|---|---|
| 25 | 1/4 cup | 0.88 |
| 50 | 1/2 cup | 1.76 |
| 100 | 1 1/8 cups | 3.53 |
| 125 | 1 1/3 cups | 4.41 |
| 150 | 1 5/8 cups | 5.29 |
| 175 | 1 7/8 cups | 6.17 |
| 200 | 2 1/8 cups | 7.05 |
| 250 | 2 2/3 cups | 8.82 |
| 300 | 3 1/4 cups | 10.6 |
| 400 | 4 1/4 cups | 14.1 |
| 500 | 5 1/3 cups | 17.6 |
Spoon reference: 1 tablespoon ≈ 5.88 g, 1 teaspoon ≈ 1.96 g.
Is oat bran heavy or light for its category?
At 94 g per cup, oat bran is the lightest of the 15 flours & starches charted on this site. At the other end of the range, potato starch weighs 160 g — 70% more for the very same cup.
Swapping these by the cupful is not like-for-like. A cup of almond flour in place of oat bran puts roughly 2 g more in the bowl, so match the grams rather than the cups.
Common questions about measuring oat bran
- How many grams is 1 cup of oat bran?
- Reckon on 94 grams per US cup of oat bran — about 3.32 ounces.
- How many grams is 2 cups of oat bran?
- About 188 g, at roughly 94 g per cup.
- How many cups is 150g of oat bran?
- About 1 ⅝ cups.
- Is oat bran the same as oatmeal?
- No. Oatmeal is made from whole rolled or cut oats, while oat bran is only the fibre-rich outer layer of the groat. Oat bran is finer and cooks into a softer, creamier porridge.
- Is oat bran the same as oat flour?
- No. Oat flour is the whole oat ground to a powder; oat bran is just the milled outer bran layer, so it's higher in soluble fibre and coarser in texture.
- Can I substitute oat bran for flour in baking?
- Partly. You can usually replace up to about a quarter of the flour with oat bran for extra fibre, but swapping all of it leaves baked goods dense and crumbly without gluten.
- How many cups is 100g of oat bran?
- 100 g of oat bran works out at roughly 1 1/8 cups.
- How many cups is 250g of oat bran?
- 250 g of oat bran works out at roughly 2 2/3 cups.
- How many grams is ½ cup of oat bran?
- Half a US cup of oat bran is about 47 grams.