Calories in 1 Cup of Oats
1 cup of oats (81 g) has 307 calories. That is 15% of a 2,000 calorie diet.
The calories come from 11 g of protein, 5.3 g of fat and 55 g of carbohydrates, a split of 14% protein, 15% fat and 71% carbs. For comparison, 3/4 cup of oats has 230 and 1 1/2 cups of oats has 460 calories. Burning 307 calories takes about 55 minutes of brisk walking or 25 minutes of running for a 155 lb adult, based on Harvard Health Publishing activity estimates.
Oats Calorie Calculator
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Oats calories by serving size
Common amounts of oats with calories and macros. Tap a row for its full nutrition page.
Oats vs similar foods
Calories per 100 g compared with other grains, rice and pasta.
Oats: common questions
How many calories are in 1 cup of oats?
1 cup of oats weighs about 81 g and has 307 calories.
How much protein is in 1 cup of oats?
1 cup of oats has 11 g of protein, which is 21% of the 50 g Daily Value.
How many carbs are in 1 cup of oats?
1 cup of oats has 55 g of carbohydrates, including 8.2 g of fiber and 0.8 g of sugars.
How much oats is 100 calories?
100 calories of oats is 26 g, about 1/4 cup of oats.
More about oats
Amount for a target
Weights and conversions
Source: USDA FoodData Central, SR Legacy. FDC ID 173904. Original description: Cereals, oats, regular and quick, not fortified, dry. Portion weights are USDA household measures.