Oatmeal (cooked): Grams to Cups
1 cup of oatmeal (cooked) = 234 grams
One US cup of oatmeal (cooked) weighs 234 grams. One 250 ml metric cup — the one used in the UK, Australia, New Zealand and Canada — holds 247 grams. To convert any weight, divide the grams by the figure for your cup.
A cup of cooked oatmeal weighs 234 g (USDA FoodData Central, oats cooked with water, without salt). That is almost three times the weight of a cup of dry oats, which USDA puts at 81 g, because the oats soak up the cooking water. A ¾ cup bowl of cooked oatmeal is 175 g and a tablespoon is about 15 g. If a recipe or nutrition label says "1 cup oats", check whether it means dry or cooked before you weigh.
Where the 234 g figure comes from
- USDA FoodData Central: 1 cup of “Cereals, oats, regular and quick, unenriched, cooked with water, without salt” = 234 g (FDC ID 173905)
This site uses 234 g per US cup of oatmeal (cooked), spooned and levelled. References checked September 2026.
How many cups is X grams of oatmeal (cooked)?
| Grams | US cups | Metric cups | Tablespoons | Ounces |
|---|---|---|---|---|
| 25 g oatmeal (cooked) | ⅛ | ⅛ | 1.71 | 0.88 |
| 50 g oatmeal (cooked) | ¼ | ¼ | 3.42 | 1.76 |
| 75 g oatmeal (cooked) | ⅓ | ⅓ | 5.13 | 2.65 |
| 100 g oatmeal (cooked) | ⅜ | ⅜ | 6.84 | 3.53 |
| 110 g oatmeal (cooked) | ½ | ½ | 7.52 | 3.88 |
| 120 g oatmeal (cooked) | ½ | ½ | 8.21 | 4.23 |
| 125 g oatmeal (cooked) | ½ | ½ | 8.55 | 4.41 |
| 130 g oatmeal (cooked) | ½ | ½ | 8.89 | 4.59 |
| 140 g oatmeal (cooked) | ⅝ | ⅝ | 9.57 | 4.94 |
| 150 g oatmeal (cooked) | ⅝ | ⅝ | 10.26 | 5.29 |
| 170 g oatmeal (cooked) | ¾ | ⅔ | 11.62 | 6.00 |
| 175 g oatmeal (cooked) | ¾ | ⅔ | 11.97 | 6.17 |
| 200 g oatmeal (cooked) | ⅞ | ¾ | 13.68 | 7.05 |
| 225 g oatmeal (cooked) | 1 | ⅞ | 15.38 | 7.94 |
| 240 g oatmeal (cooked) | 1 | 1 | 16.41 | 8.47 |
| 250 g oatmeal (cooked) | 1⅛ | 1 | 17.09 | 8.82 |
| 275 g oatmeal (cooked) | 1⅛ | 1⅛ | 18.8 | 9.70 |
| 300 g oatmeal (cooked) | 1¼ | 1¼ | 20.51 | 10.58 |
| 350 g oatmeal (cooked) | 1½ | 1⅜ | 23.93 | 12.35 |
| 400 g oatmeal (cooked) | 1¾ | 1⅝ | 27.35 | 14.11 |
| 450 g oatmeal (cooked) | 1⅞ | 1⅞ | 30.77 | 15.87 |
| 500 g oatmeal (cooked) | 2⅛ | 2 | 34.19 | 17.64 |
How to measure oatmeal (cooked) accurately
The 234 g figure assumes the spooned-and-levelled method: spoon the oatmeal (cooked) into a dry measuring cup and sweep the top flat with a straight edge. Scooping the cup through the bag compacts it and gives a heavier cup.
- 1 US cup of oatmeal (cooked) = 234 g
- 1 metric cup (250 ml) of oatmeal (cooked) = 247 g
- ¾ cup = 176 g
- ½ cup = 117 g
- ⅓ cup = 78 g
- ¼ cup = 59 g
- 1 tablespoon = 14.6 g
Frequently asked questions
How many cups is 100 grams of oatmeal (cooked)?
100 grams of oatmeal (cooked) is about ⅜ US cups, based on 234 g per cup, or ⅜ metric cups.
How many grams in a cup of oatmeal (cooked)?
One US cup of oatmeal (cooked) weighs 234 grams. A 250 ml metric cup holds 247 grams.
How many cups is 250 grams of oatmeal (cooked)?
250 grams of oatmeal (cooked) is about 1⅛ US cups, or 1 metric cups.
Does a UK cup of oatmeal (cooked) weigh the same as a US cup?
No. A UK, Australian or Canadian metric cup is 250 ml against the US 236.6 ml, so it holds about 5.7% more — 247 g of oatmeal (cooked) rather than 234 g.
How many tablespoons is 100 grams of oatmeal (cooked)?
100 grams of oatmeal (cooked) is about 6.84 tablespoons.
How many grams is 1 cup of oatmeal?
1 cup of cooked oatmeal is 234 grams (USDA FoodData Central). 1 cup of dry oats is much lighter, 81 g in USDA's data, so check which one your recipe means.
How many grams is ¾ cup of cooked oatmeal?
175 grams. USDA lists ¾ cup of oatmeal cooked with water at 175 g, and half a cup is 117 g.
How many grams is ⅓ cup of dry oats?
27 grams (USDA FoodData Central), the usual single serving printed on an oat canister.
How many cups is 100 g of cooked oatmeal?
A scant half cup: 100 ÷ 234 = 0.43 cup, or about 7 tablespoons at 14.6 g each.