Calorie comparison
Cauliflower vs Onion
Per 100 grams, cauliflower is the lighter choice by 15 calories, while cauliflower delivers more protein. The right pick depends on your goal — fewer calories for a cut, more protein to stay full.
Per 100 grams
| Per 100 g | Cauliflower | Onion |
|---|---|---|
| Calories | 25 | 40 |
| Protein | 1.9 g | 1.1 g |
| Carbs | 5 g | 9 g |
| Fat | 0.3 g | 0.1 g |
Orange highlights the "better for a calorie deficit" value (fewer calories, fat and carbs; more protein). Your goals decide what "better" means.
Per typical serving
🥦 Cauliflower
1 cup (107 g)
27 cal
2 g protein · 5.4 g carbs · 0.3 g fat
🧅 Onion
1 medium (110 g)
44 cal
1.2 g protein · 9.9 g carbs · 0.1 g fat
Frequently asked
Which has more calories, cauliflower or onion?
Per 100 g, cauliflower has 25 calories and onion has 40. Cauliflower is lower in calories.
Which has more protein, cauliflower or onion?
Cauliflower has 1.9 g of protein per 100 g; onion has 1.1 g. Cauliflower wins on protein.
Is cauliflower or onion better for weight loss?
For a calorie deficit, the lower-calorie, higher-protein option usually helps you stay full on fewer calories. Here that leans toward cauliflower — but portion size matters more than which food you pick.
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