Carbs in Cooked Onion
Keto-friendlyCooked Onion (per 100 g) contains 8g total carbs, 1.4g net carbs, 0.1g fat, 1g protein, and 35 calories.
Last updated June 10, 2026 · Reviewed by Jordan Lee, RD, Registered Dietitian
1.4g
Net carbs
8g
Total carbs
6.6g
Fiber
1g
Protein
0.1g
Fat
35
Calories
Values per 100 g.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 100 g (3.5 oz) | 1.4g | 8g | 1g | 35 |
| 1 oz (28 g) | 0.4g | 2.2g | 0.3g | 10 |
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 35 |
| Total carbs | 8g |
| Net carbs | 1.4g |
| Fiber | 6.6g |
| Sugar | 6.2g |
| Sugar alcohols | 0g |
| Protein | 1g |
| Fat | 0.1g |
| Sodium | 40mg |
| Potassium | 0mg |
Source: Open Food Facts (Marks and Spencer). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in cooked onion?
- Cooked Onion has 8g of total carbs and 1.4g of net carbs per 100 grams.
- How many net carbs are in cooked onion?
- Cooked Onion has 1.4g of net carbs per 100 grams (total carbs 8g minus 6.6g fiber).
- Is cooked onion keto-friendly?
- Yes — with 1.4g net carbs per 100g, cooked onion fits a ketogenic diet in normal portions.
- How many calories are in cooked onion?
- Cooked Onion has 35 calories per 100 grams.
