Carbs in onion: 57.1g Net Carbs per 100g

Q: How many net carbs are in onion?

onion contains 57.1g net carbs per 100g, calculated by subtracting 2.3g of dietary fiber from 59.4g total carbohydrates.

Q: How many calories are in onion?

onion has 289 calories per 100g, with 10.9g protein, 0.0g fat, and 59.4g total carbohydrates.

Complete nutrition facts — total carbs, fiber, sugar, calories, and whether onion fits your keto or low-carb diet.

57.1g Net Carbs

59.4g Total Carbs

289 Calories

2.3g Fiber

Is onion Keto-Friendly?

❌ onion is high in carbs — limit on keto

onion contains 57.1g net carbs per 100g, which is too high for most ketogenic diets. Consider lower-carb alternatives or very small servings.

Full Nutrition Facts — per 100g

Net Carbs	57.1g
Total Carbohydrates	59.4g
Dietary Fiber	2.3g
Sugars	7.0g
Protein	10.9g
Total Fat	0.0g
Calories	289

Source: USDA FoodData Central (FDC ID: 2438059)

Net Carbs by Serving Size

50g

28.6g net carbs

29.7g total · 1.1g fiber · 144 cal

100g

57.1g net carbs

59.4g total · 2.3g fiber · 289 cal

150g

85.7g net carbs

89.1g total · 3.4g fiber · 434 cal

200g

114.2g net carbs

118.8g total · 4.6g fiber · 578 cal

Compare: Similar Snacks

Frequently Asked Questions

How many net carbs are in onion?

onion contains 57.1g net carbs per 100g, calculated by subtracting 2.3g of dietary fiber from 59.4g total carbohydrates.

Can I eat onion on keto?

onion has 57.1g net carbs per 100g, which is too high for strict keto. Consider lower-carb alternatives.

How many calories are in onion?

onion has 289 calories per 100g, with 10.9g protein, 0.0g fat, and 59.4g total carbohydrates.

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Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. Carb and nutrition values are sourced from the USDA FoodData Central database. Consult with a healthcare provider before making significant dietary changes.