How many calories are in onion?

A 1 undetermined cup, chopped (160 g) serving of onion has about 64 calories. Per 100 g, it has 40 calories.

How much protein is in onion?

Onion provides about 2 g of protein per 1 undetermined cup, chopped (160 g) serving.

What are the macros in onion?

Per serving, onion has roughly 2 g protein, 15 g carbohydrate, and 0 g fat.

Vegetables

Onion nutrition facts

A 1 undetermined cup, chopped (160 g) serving of onion provides 64 calories, 2 g protein, 15 g carbohydrate, and 0 g fat. The label below toggles between a serving and 100 g.

Calories

2 g

Protein

15 g

Carbs

0 g

Fat

Vitamins & minerals

Per serving (160 g)

Vitamin C: 11.8 mg
Vitamin E: 0.03 mg
Vitamin K: 0.64 mcg
Thiamin (B1): 0.07 mg
Riboflavin (B2): 0.04 mg
Niacin (B3): 0.19 mg
Vitamin B6: 0.19 mg
Folate (DFE): 30.4 mcg
Magnesium: 16.0 mg
Phosphorus: 46.4 mg
Zinc: 0.27 mg
Copper: 0.06 mg
Manganese: 0.21 mg
Selenium: 0.80 mcg

Questions

How many calories are in onion?: A 1 undetermined cup, chopped (160 g) serving of onion has about 64 calories. Per 100 g, it has 40 calories.
How much protein is in onion?: Onion provides about 2 g of protein per 1 undetermined cup, chopped (160 g) serving.
What are the macros in onion?: Per serving, onion has roughly 2 g protein, 15 g carbohydrate, and 0 g fat.

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Nutrition data from USDA FoodData Central (fdc.nal.usda.gov), public domain. Values are typical figures and can vary by variety, ripeness, and preparation.