Averages based on 2,199 oatmeal products in our database.
Oatmeal nutrient highlights
Dietary Fiber
~10g per 100g (dry)Oats are one of the highest-fiber grains. A typical 40g dry serving provides about 4g of fiber. Steel cut and rolled oats have similar fiber content per gram.
Protein
~13g per 100g (dry)Oats contain more protein per 100g than most other common grains. A typical 40g dry serving delivers about 5g of protein.
Total Fat
~6.5g per 100g (dry)Oats are higher in fat than most grains, though most of the fat is unsaturated. Flavored instant varieties may contain additional fats from added ingredients.
Calories
~389 per 100g (dry)Per 100g dry weight, oats are calorie-dense like most grains. A typical cooked single serving (40g dry, ~240g cooked) provides about 150 calories before toppings.
Oatmeal processing scores by brand
15 oatmeal products ranked by processing score (lowest first) from our analysis.
How does processing affect oatmeal?
In our analysis, plain rolled oats and steel cut oats typically score Level 1-2 (Minimally Processed to Processed). The primary processing is mechanical: cutting, rolling, or steaming the whole oat groat. Instant oatmeal packets score higher, often Level 3-4, due to added sugars, artificial flavors, thickeners, and preservatives. The difference between a 1-ingredient canister of rolled oats and a flavored instant packet with 15+ ingredients is substantial in our scoring system.
Notably, "instant" vs "old-fashioned" describes the physical processing of the oat (how thin it is rolled), which is not the primary driver of processing scores. The added ingredients in flavored varieties are what push scores upward.
What should you look for on oatmeal labels?
- 1Plain oats should list one ingredient: whole grain oats (or similar). Any additional ingredients suggest added processing.
- 2Flavored instant oatmeal packets often contain 10-20 ingredients including sugar, natural flavors, guar gum, and caramel color.
- 3"Protein oatmeal" products frequently add whey protein isolate, sucralose, and other additives, so check the full ingredient list.
- 4Steel cut, rolled, and instant oats have similar base nutrition per gram. The processing score difference comes from added ingredients, not the oat form itself.
Frequently asked questions
How many calories are in oatmeal?
Dry oats contain approximately 389 calories per 100g. A typical single serving (40g dry / ~1/2 cup) provides about 150 calories before milk, toppings, or sweeteners are added. Cooked plain oatmeal is about 68 calories per 100g due to water absorption.
How much fiber is in oatmeal?
Oats provide approximately 10g of dietary fiber per 100g dry weight, or about 4g per typical 40g serving. This includes beta-glucan, a type of soluble fiber. Steel cut, rolled, and instant oats contain similar fiber levels per gram when comparing plain, unflavored varieties.
Is instant oatmeal ultra-processed?
In our analysis, it depends on the product. Plain instant oats with no added ingredients score Level 1-2 because the "instant" designation refers to how thin the oat is rolled, not whether ingredients have been added. However, flavored instant oatmeal packets with added sugars, artificial flavors, and thickeners often score Level 3-4.
What is the difference between steel cut and rolled oats?
Steel cut oats are chopped oat groats; rolled oats are steamed and flattened. Both are mechanically processed with similar nutrition per gram. In our database, both plain varieties score comparably in processing levels. The main differences are texture and cooking time, not nutritional content or processing score.
Which oatmeal brands are least processed?
In our database, oatmeal products with the shortest ingredient lists (typically just "whole grain oats") score the lowest processing levels regardless of brand. Check the brand comparison table above for specific products and scores.
Is oatmeal good for you?
Oatmeal provides fiber (including beta-glucan), protein, and iron per serving, and plain varieties score Level 1-2 in our processing analysis. Whether oatmeal fits your dietary needs depends on individual circumstances. We present the nutritional data and processing scores; consult a healthcare provider for personalized guidance.
How much protein in oatmeal?
Oatmeal contains approximately 13g of protein per 100g dry weight, or about 5g per typical 40g serving. This is more protein per 100g than most common grains. "Protein oatmeal" products boost this with added whey protein isolate, but also increase the ingredient count and processing score in our analysis.