Vegetables

Sweet Onions Nutrition Facts

FoodData Central Updated 6 April 2026

Sweet Onions contains 47.4 calories, 1.2g protein, 11.2g carbs, and 0.1g fat. Sweet Onions is a vegetable that is very low in calories.

47.4

cal

11.2g

carbs

1.2g

protein

0.1g

fat

1.3g

fiber

7.4g

sugar

Vitamins in Sweet Onions

Per NLEA serving ~148g

Vitamin C
7.1mg
8%
Vitamin E
0.03mg
<1%
Vitamin K
0.44mcg
<1%
Vitamin B6
0.19mg
11%
Thiamin (B1)
0.06mg
5%
Riboflavin (B2)
0.03mg
2%
Niacin (B3)
0.19mg
1%
Folate
34mcg
9%

Minerals in Sweet Onions

Per NLEA serving ~148g

Calcium
29.6mg
2%
Iron
0.38mg
2%
Magnesium
13.3mg
3%
Phosphorus
40mg
3%
Potassium
176mg
4%
Sodium
11.8mg
<1%
Zinc
0.19mg
2%
Selenium
0.74mcg
1%
Copper
0.09mg
10%
Manganese
0.12mg
5%

Learn More About Sweet Onions

How Many Calories Are In Sweet Onions? How Many Carbs Are In Sweet Onions? How Much Protein Is In Sweet Onions? How Much Fat Is In Sweet Onions? How Much Fiber Is In Sweet Onions? What Is Sweet Onions Good For? Is Sweet Onions Healthy?

Similar Foods

Compare Sweet Onions with other vegetables.

Broccoli

31 cal | 2.5g protein | 6g carbs

Spinach

7 cal | 0.9g protein | 1.1g carbs

Carrot

25 cal | 0.5g protein | 5.9g carbs

Tomato

22 cal | 1.1g protein | 4.8g carbs

Cucumber

16 cal | 0.7g protein | 3.7g carbs

Bell Pepper

31 cal | 1.2g protein | 7.1g carbs
Verified Nutrition Data

Trusted & Verified Nutritional Information

All nutritional data on Food Index is sourced from official U.S. government databases and verified by nutrition experts at leading federal agencies.

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HHS Health Standards
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Nutrient values from certified lab analysis

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Data reviewed by nutrition scientists

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Synced with latest official database releases

Nutritional values are based on standard reference data and may vary slightly based on preparation methods, brands, and natural variation in foods. Always consult with a healthcare professional for personalized dietary advice.

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