Calorie comparison
Cucumber vs Onion
Per 100 grams, cucumber is the lighter choice by 25 calories, while onion 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 | Cucumber | Onion |
|---|---|---|
| Calories | 15 | 40 |
| Protein | 0.7 g | 1.1 g |
| Carbs | 3.6 g | 9 g |
| Fat | 0.1 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
🥒 Cucumber
1/2 cup sliced (52 g)
8 cal
0.4 g protein · 1.9 g carbs · 0.1 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, cucumber or onion?
Per 100 g, cucumber has 15 calories and onion has 40. Cucumber is lower in calories.
Which has more protein, cucumber or onion?
Cucumber has 0.7 g of protein per 100 g; onion has 1.1 g. Onion wins on protein.
Is cucumber 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 cucumber — but portion size matters more than which food you pick.
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