Oats - How Many Calories?

Reviewed by Dyt. Şeyda Ertaş, Registered Dietitian Last reviewed: May 16, 2026

Oats

40 gr
Oats image
156 kcal
Carbohydrate 26.52 gr %67
Protein 6.76 gr %17
Fat 2.76 gr %16

Oats Nutrition Values

Nutrients 100 gr 1 1 Serving (Raw)
Calories (kcal) 389 156
Carbohydrate (g) 66.3 26.52
Protein (g) 16.9 6.76
Fat (g) 6.9 2.76
Fiber (g) 10.6 4.24
Cholesterol (mg) 0 0
Sodium (mg) 2 0.8
Potassium (mg) 429 171.6
Calcium (mg) 54 21.6
Iron (mg) 4.7 1.88
Vitamin A (IU) 0 0
Vitamin C (mg) 0 0

Nutritional values are based on the USDA database. Natural variations may occur; this information is for informational purposes only and does not constitute medical advice.

Dietitian's Tips for Consuming Oats

  • Metabolic Effect: Oats contain beta-glucan fiber, which slows glucose absorption and prevents sharp spikes in blood sugar, supporting stable insulin response. Regular consumption has also been shown to gradually reduce LDL cholesterol, making it a heart-friendly choice.
  • Consumption Recommendation: A serving of 40–50 grams of cooked oats in the morning provides sustained energy and keeps hunger at bay until lunch. Adding fresh fruit or a pinch of cinnamon enhances both flavor and nutritional value without significantly increasing calories.
  • Caution: Individuals with celiac disease or gluten sensitivity should opt for certified gluten-free oats, as cross-contamination in conventional processing facilities is a real concern. Exceeding recommended portions may destabilize blood sugar in people with insulin resistance due to the relatively high carbohydrate content.
  • Exercise: Eating a bowl of oats 1–2 hours before training delivers slow-releasing carbohydrates that fuel muscles throughout the workout. When combined with a protein source such as yogurt or milk after exercise, oats effectively support glycogen replenishment and muscle recovery.