Vegetable
How many calories are in an onion?
1 medium (110 g) of an onion has about 44 calories, with 1.2g protein, 10.3g carbohydrates and 0.1g fat.
An onion is a pungent bulb vegetable that adds savory flavor and provides fiber and antioxidants.
Calories
44
Per serving
1 medium (110 g)
of which sugars: 4.7g
Source: USDA FoodData Central. Values are averages and vary by brand and preparation.
Calories and macros by amount
| Amount | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 1 medium (110 g) | 44 | 1.2g | 10.3g | 0.1g |
| Per 100 g | 40 | 1.1g | 9.4g | 0.1g |
Where the calories come from
Share of calories from each macronutrient
Burn it off
Roughly how long it takes to burn 44 calories:
Estimated for a ~70 kg (154 lb) adult; your rate varies.
Log an onion in one photo
Skip the manual entry. Snap a photo with LensNutra’s AI food scanner and its calories and macros are logged automatically — portions and all.
Frequently asked questions
How many calories are in an onion?
1 medium (110 g) of an onion has about 44 calories, with 1.2g protein, 10.3g carbohydrates and 0.1g fat.
How much protein is in an onion?
1 medium (110 g) of an onion contains about 1.2g of protein.
How many carbs and fat are in an onion?
1 medium (110 g) of an onion contains about 10.3g of carbohydrates and 0.1g of fat.
Is an onion good for weight loss?
At about 44 calories per serving, an onion can fit a weight-loss plan when it suits your daily calorie budget. Log it by photo with LensNutra to stay on track.
How long does it take to burn off an onion?
Burning about 44 calories takes roughly 10 minutes of walking or 4 minutes of running.
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