Calories in Oats

Data reviewed 2026-09-08 against USDA FoodData Central (SR Legacy).

A 100 g serving of oats has about 71 kcal, with 2.5 g of protein, 12 g of carbohydrate (1.7 g of that fibre) and 1.5 g of fat. The table below gives the full breakdown and the most common portion sizes.

Nutrition per 100 g

NutrientPer 100 g
Calories71 kcal
Protein2.5 g
Carbohydrate12 g
Fibre1.7 g
Sugars0.3 g
Fat1.5 g
Saturated fat0.3 g
Sodium4 mg
Cholesterol0 mg

Common portions

PortionWeightCalories
cup234 g166 kcal
tbsp14.6 g10 kcal

Log oats in a recipe

To see how oats affects a whole dish, drop it into the recipe calorie calculator with the rest of your ingredients — it totals calories, protein, carbs and net carbs for the recipe, per serving and per 100 g. The methodology shows the exact arithmetic.

Frequently asked questions

How many calories are in oats?

About 71 kcal per 100 g. Portion calories depend on how much you use — see the portions table above for common amounts.

How much protein is in oats?

Oats has roughly 2.5 g of protein per 100 g.

Is oats keto-friendly?

Its net carbs are about 10.3 g per 100 g (total carbs 12 g minus 1.7 g fibre). Whether it fits your day depends on portion size and your carb target.

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Calories in Potato · Calories in Sweet potato · Calories in Broccoli · Calories in Spinach · Calories in Cucumber · Calories in Avocado

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