Are Oats keto?
Not keto-friendly 23 g net carbs per half a cup dry (40 g) — 115% of a 20 g keto day.
Short answer: Not in normal portions. Half a cup dry (40 g) of oats: 23 g net carbs — 115% of a strict 20 g keto day — with 2.6 g fat and 5.3 g protein.
Oats are high in fibre but higher still in starch. A small bowl of porridge uses more than a full day of carbs.
How oats fits a keto carb budget
One serving is 23 g net carbs — 115% of a 20 g day. Even half a serving uses 57% of the budget.
Worked example. 40 g of oats = 27.1 g total carbs − 4 g fibre = 23 g net carbs, 2.6 g fat, 5.3 g protein and 152 kcal.
If you still want some, plan it: a strict day is 20 g, and how net carbs are counted explains why the fibre here does not rescue it.
Nutrition facts
| Nutrient | Per 100 g | Per half a cup dry (40 g) |
|---|---|---|
| Calories | 379 kcal | 152 kcal |
| Fat | 6.5 g | 2.6 g |
| Protein | 13.2 g | 5.3 g |
| Total carbohydrate | 67.7 g | 27.1 g |
| Fibre | 10.1 g | 4 g |
| Net carbs | 57.6 g | 23 g |
Where the energy comes from:
How to eat oats on keto
- "Noatmeal" with hemp hearts, flax and coconut cream copies the texture.
Lower-carb swaps
| Swap | Net carbs / serving | Saves |
|---|---|---|
| Chia seeds (two tablespoons) | 1.8 g | 21.2 g |
| Flax seeds (two tablespoons ground) | 0.2 g | 22.8 g |
Compared with other starches
Oats ranks #8 of 8 starches in our database by net carbs per 100 g (lowest first). The foods keto removes. Here is exactly how far over the budget each one goes.
| Food | Net carbs / 100 g | Per serving |
|---|---|---|
| Lentils (cooked) | 12.2 g | 12.1 g |
| Black beans (cooked) | 15 g | 12.9 g |
| Quinoa (cooked) | 18.5 g | 34.2 g |
| Chickpeas (cooked) | 19.8 g | 16.2 g |
| White rice (cooked) | 27.8 g | 43.9 g |
| Pasta (cooked) | 29.1 g | 40.7 g |
See all starches ranked by net carbs →
Frequently asked questions
How many net carbs are in oats?
Oats has about 57.6 g of net carbs per 100 g (67.7 g total carbohydrate minus 10.1 g fibre), and about 23 g per half a cup dry (40 g).
Can you eat oats on keto?
Not in normal portions. One half a cup dry contains 23 g net carbs, 115% of a strict daily limit.
Values are per 100 g of the raw or stated food, rounded, from USDA FoodData Central. Brands and varieties differ — check the label for packaged products.