Carbs in Yellow Onion
Keto-friendlyYellow Onion (per 100 g) contains 8.6g total carbs, 6.7g net carbs, 0.1g fat, 0.8g protein, and 38 calories.
Last updated June 10, 2026 · Reviewed by Jordan Lee, RD, Registered Dietitian
6.7g
Net carbs
8.6g
Total carbs
1.9g
Fiber
0.8g
Protein
0.1g
Fat
38
Calories
Values per 100 g.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 100 g (3.5 oz) | 6.7g | 8.6g | 0.8g | 38 |
| 1 oz (28 g) | 1.9g | 2.4g | 0.2g | 11 |
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 38 |
| Total carbs | 8.6g |
| Net carbs | 6.7g |
| Fiber | 1.9g |
| Sugar | 0g |
| Sugar alcohols | 0g |
| Protein | 0.8g |
| Fat | 0.1g |
| Sodium | 1mg |
| Potassium | 182mg |
Source: USDA FoodData Central (Foundation). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in yellow onion?
- Yellow Onion has 8.6g of total carbs and 6.7g of net carbs per 100 grams.
- How many net carbs are in yellow onion?
- Yellow Onion has 6.7g of net carbs per 100 grams (total carbs 8.6g minus 1.9g fiber).
- Is yellow onion keto-friendly?
- Yes — with 6.7g net carbs per 100g, yellow onion fits a ketogenic diet in normal portions.
- How many calories are in yellow onion?
- Yellow Onion has 38 calories per 100 grams.
