Carbs in Oatmeal (1/2 Cup Dry Rolled Oats)
How many carbs are in oatmeal (1/2 cup dry rolled oats)?
Oatmeal (1/2 Cup Dry Rolled Oats) has 57.5g net carbs per 100g — 67.5g total carbs minus 10g fiber — plus 12.5g protein, 7.5g fat, and 375 calories. 1/2 cup dry rolled oats (40g) works out to about 23g net carbs and 150 calories. That makes oatmeal (1/2 cup dry rolled oats) high in net carbs and about average for the typical breads and grain, which averages about 44.9g net carbs per 100g. At this carb count, oatmeal (1/2 cup dry rolled oats) is best limited to small portions on keto (usually 20–50g net carbs per day). Values are per per 100 g, sourced from Manufacturer-reported values; net carbs are computed by CarbMeNot.
Keeping an eye on carbs in oatmeal (1/2 cup dry rolled oats)?
Oatmeal (1/2 Cup Dry Rolled Oats) runs higher in carbs, so portions matter. CarbMeNot tracks every gram from a photo, so you stay under your daily limit without the math.
Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Is oatmeal (1/2 cup dry rolled oats) keto-friendly?
Oatmeal (1/2 Cup Dry Rolled Oats) is generally not keto-friendly. It has 57.5g net carbs per 100g (67.5g total carbs − 10g fiber). A typical serving — 1/2 cup dry rolled oats (40g) — is about 23g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 1/2 cup dry rolled oats | 23g | 27g | 5g | 150 |
| 100 g (3.5 oz) | 57.5g | 67.5g | 12.5g | 375 |
| 1 oz (28 g) | 16.1g | 18.9g | 3.5g | 105 |
How many calories are in oatmeal (1/2 cup dry rolled oats)?
Oatmeal (1/2 Cup Dry Rolled Oats) has 375 calories per 100g. 1/2 cup dry rolled oats (40g) has about 150 calories. That's alongside 12.5g protein, 7.5g fat, and 57.5g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 375 |
| Total carbs | 67.5g |
| Net carbs | 57.5g |
| Fiber | 10g |
| Sugar | 2.5g |
| Sugar alcohols | 0g |
| Protein | 12.5g |
| Fat | 7.5g |
| Sodium | 0mg |
| Potassium | 350mg |
Source: Manufacturer-reported values (bread-grains). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in oatmeal (1/2 cup dry rolled oats)?
- Oatmeal (1/2 Cup Dry Rolled Oats) has 67.5g of total carbs and 57.5g of net carbs per 100 grams.
- How many net carbs are in oatmeal (1/2 cup dry rolled oats)?
- Oatmeal (1/2 Cup Dry Rolled Oats) has 57.5g of net carbs per 100 grams (total carbs 67.5g minus 10g fiber).
- Is oatmeal (1/2 cup dry rolled oats) keto-friendly?
- Oatmeal (1/2 Cup Dry Rolled Oats) is generally not keto-friendly. It has 57.5g net carbs per 100g (67.5g total carbs − 10g fiber). A typical serving — 1/2 cup dry rolled oats (40g) — is about 23g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
- How many calories are in oatmeal (1/2 cup dry rolled oats)?
- Oatmeal (1/2 Cup Dry Rolled Oats) has 375 calories per 100 grams.
- How many carbs are in 1/2 cup dry rolled oats?
- 1/2 cup dry rolled oats (40g) has about 23g net carbs, 27g total carbs, and 150 calories.
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CarbMeNot provides general nutrition information, not medical advice. Values are estimates — verify before relying on them for any health decision. See our Medical Disclaimer.