How many calories in a portion of Onion?

1 medium onion (110g) contains approximately 44 kcal.

Is Onion good for weight loss?

Yes! Onion is very low in calories (40 kcal/100g) and is well suited for a calorie-reduced diet.

Onion contains 1.1g protein per 100g. The protein content is relatively low.

Onion contains 40 kcal per 100g, with 1.1g protein, 0.1g fat and 9g carbohydrates.

Onion has 40 kcal per 100g – with 1.1g protein, 0.1g fat and 9g carbs. 1 medium onion = 44 kcal. Complete nutrition facts.