Broccoli vs Onion: Which Has More Calories?
Per 100 g, Broccoli has 34 kcal and Onion has 40 kcal, so Broccoli has 15% fewer calories.
Broccoli has more protein (2.82 g vs 1.1 g). Onion has more carbohydrates (9.34 g vs 6.64 g). Relative to calories, Broccoli is the better protein source (8.29 g vs 2.75 g of protein per 100 kcal).


Nutrition Facts
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Amount Per Serving:
Broccoli vs Onion 100g Compare
| per 100g | Broccoli | Onion |
|---|---|---|
| Calories | 34 | 40 |
| Carbohydrates | 6.64 g | 9.34 g |
| Fat | 0.37 g | 0.1 g |
| Dietary fiber | 2.6 g | 1.7 g |
| Protein | 2.82 g | 1.1 g |
| Calcium | 47 mg | 23 mg |
| Iron | 0.73 mg | 0.21 mg |
| Magnessium | 21 mg | 10 mg |
| Potassium | 316 mg | 146 mg |
| Sodium | 33 mg | 4 mg |
| Vitaminium A | 623 IU | 2 IU |
| Vitaminium B1 (Thiamine) | 0.071 mg | 0.046 mg |
| Vitaminium B2 (riboflavin) | 0.117 mg | 0.027 mg |
| Vitaminium B3 (Niacin) | 0.639 mg | 0.116 mg |
| Vitaminium B5 | 0.573 mg | 0.123 mg |
| Vitaminium B6 | 0.175 mg | 0.12 mg |
| Vitaminium B9 (Folic acid) | 63 µg | 0.019 µg |
| Vitaminium C | 89.2 mg | 7.4 mg |
| Vitaminium E | 0.17 mg | 0.02 mg |
| Beta karoten | 361 µg | 1 µg |
Less Calories in Broccoli
At first glance, you can see that in broccoli is less calories than in onion.
Broccoli has 34 kcal per 100g and onion 40 kcal per 100g so it is pretty easy to calculate that the difference is about 18%.
In broccoli and in onion most calories came from carbs.
See tables below to compare broccoli with onion in details.
Broccoli 100g
34kcalCalories source
- 65% CARBS.
- 27% PROTEIN
- 8% FAT
Onion 100g
40kcalCalories source
- 88% CARBS
- 10% PROTEIN
- 2% FAT
Compares of broccoli
Compares of onion
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About the data
Nutrition values on this page are given per 100 g of the food and are based on the official United States Department of Agriculture FoodData Central database. The exact record used for each food is linked under the tables.
Marcin Piotrowicz – calories-info.com creator · Healthy diet and healthy lifestyle promoter. The information is for general purposes and is not medical or dietary advice.