What are the health benefits of Onion?

The key health benefits of Onion include its nutritional profile: 64 calories, 1.8g protein, 14.9g carbs, and 2.7g fibre per cup, chopped (160g). It falls in the vegetables food group.

How many calories are in Onion?

Onion contains 64 calories per cup, chopped (160g).

Vegetables

What Is Onion Good For?

Q: What is Onion good for?

Onion is good for providing 64 calories, 1.8g protein, and 0.2g fat per cup, chopped (160g). Onion is a nutrient-rich vegetable that is very low in calories.

FoodData CentralUpdated 30 March 2026

Onion is a nutrient-rich vegetable that is very low in calories. Discover the nutritional benefits and how onion can support your health goals.

Onion provides 64 calories, 1.8g protein, 14.9g carbohydrates, and 0.2g fat per cup, chopped (160g). It is a source of Vitamin C (7.4mg per 100g) and can be part of a balanced diet as part of a varied nutritional plan.