What does 100 calories of oatmeal (cooked with water) look like?

100 calories =⅔ cup141 g · 5.0 oz
Low calorie density0.71 kcal/g
Each 🥣 = one cup (~234.0 g). The last icon shows a part of one.
Food volume for 100 kcal

Oatmeal (cooked with water) has 71 calories per 100 g, so 100 calories is ⅔ cup of oatmeal (141 g). That's more food per calorie than most bread, rice & grains on this site (average 44 g).

Oatmeal (cooked with water): 50 to 500 calories

CaloriesGramsOuncesCups
50 kcal70 g2.5 oz⅓
100 kcal141 g5.0 oz⅔
200 kcal282 g9.9 oz1¼
300 kcal422 g14.9 oz1¾
500 kcal704 g24.8 oz3

What's in 100 calories of oatmeal (cooked with water)

3.6 gprotein
16.9 gcarbs
2.1 gfat
2.4 gfiber

Protein 14% Carbs 67% Fat 19% of calories

Want more food for the same 100 calories?

These give you at least 2½ times more volume than oatmeal (cooked with water):

Compare with other bread, rice & grains

Food100 kcal isGrams
🥣 Oatmeal (cooked with water)⅔ cup141 g
🍚 Brown rice (cooked)½ cup89 g
🍚 Couscous (cooked)½ cup89 g
🍚 Quinoa (cooked)½ cup83 g
🍚 White rice (cooked)⅓ cup77 g
🍜 Egg noodles (cooked)½ cup72 g
🍝 Whole wheat pasta (cooked)½ cup67 g
🍝 Pasta (cooked)½ cup (spaghetti)63 g
🌮 Corn tortilla2 tortillas46 g
🍞 English muffin¾ muffin44 g
🥞 Pancakes1¼ 4-inch pancakes44 g
🍞 Whole wheat bread1¼ slices40 g
🍞 Rye bread1¼ slices39 g

See all bread, rice & grains →

Questions

How much is 100 calories of oatmeal (cooked with water)?

100 calories of oatmeal (cooked with water) is about 141 g (5.0 oz), or roughly ⅔ cup.

How many calories are in 100 g of oatmeal (cooked with water)?

71 calories per 100 g, according to USDA FoodData Central.

Is oatmeal good for weight loss?

Low calorie density (0.71 kcal per gram). Generous portions fit easily into a calorie budget. 100 calories also gives you 3.6 g of protein and 2.4 g of fiber.

How many calories are in one cup?

About 166 calories.

How many cups is 200 calories?

About 1¼ (282 g).

Free printable

The 100-calorie cheat sheet

One page with 300+ foods and their exact 100-calorie portions. Stick it on the fridge.

Source: USDA FoodData Central, "Cereals, oats, regular and quick, unenriched, cooked with water (includes boiling and microwaving), without salt" (FDC ID 173905). Grams for 100 kcal = 100 ÷ calories per gram. Unit weight: USDA: 1 cup = 234.0 g. Real portions vary by size, variety and preparation. Updated 2026-10-23.