What does 100 calories of onion look like?
Onion has 40 calories per 100 g, so 100 calories is 2¼ medium onions (250 g). That's a smaller portion than most vegetables on this site (average 366 g per 100 kcal). You also get 4.2 g of fiber, which helps you stay full. Foods like this are ideal for bulking up meals without adding many calories.
Onion: 50 to 500 calories
| Calories | Grams | Ounces | Medium onions |
|---|---|---|---|
| 50 kcal | 125 g | 4.4 oz | 1¼ |
| 100 kcal | 250 g | 8.8 oz | 2¼ |
| 200 kcal | 500 g | 17.6 oz | 4½ |
| 300 kcal | 750 g | 26.5 oz | 6¾ |
| 500 kcal | 1250 g | 44.1 oz | 11 |
What's in 100 calories of onion
Want more food for the same 100 calories?
These give you at least 2½ times more volume than onion:
Compare with other vegetables
| Food | 100 kcal is | Grams |
|---|---|---|
| 🧅 Onion | 2¼ medium onions | 250 g |
| 🥒 Dill pickles | 24 pickle spears | 833 g |
| 🥬 Bok choy | 11 cups (shredded) | 769 g |
| 🥬 Iceberg lettuce | 10 cups (shredded) | 714 g |
| 🥬 Celery | 18 medium stalks | 714 g |
| 🥒 Cucumber | 2¼ cucumbers (8 in) | 667 g |
| 🔴 Radishes | 139 radishes | 625 g |
| 🥬 Romaine lettuce | 13 cups (shredded) | 588 g |
| 🥒 Zucchini | 3 medium zucchini | 588 g |
| 🍅 Cherry tomatoes | 33 cherry tomatoes | 556 g |
| 🥬 Sauerkraut | 3¾ cups | 526 g |
| 🫑 Green bell pepper | 4¼ medium peppers | 500 g |
| 🥬 Asparagus | 31 spears | 500 g |
Questions
How much is 100 calories of onion?
100 calories of onion is about 250 g (8.8 oz), or roughly 2¼ medium onions.
How many calories are in 100 g of onion?
40 calories per 100 g, according to USDA FoodData Central.
Is onion good for weight loss?
Very low calorie density (0.40 kcal per gram). You can eat a large volume of this food for few calories. 100 calories also gives you 2.8 g of protein and 4.2 g of fiber.
How many calories are in one medium onion?
About 44 calories.
How many medium onions is 200 calories?
About 4½ (500 g).
The 100-calorie cheat sheet
One page with 300+ foods and their exact 100-calorie portions. Stick it on the fridge.