All Foods
Cucumber vs Onion
Calories, macronutrients and nutrition facts compared side by side (per 100g).
Nutrition Comparison
| Per 100g | Cucumber | Onion |
|---|---|---|
| Calories | 15kcal | 40kcal |
| Protein | 0.7g | 1.1g |
| Carbs | 3.6g | 9.3g |
| Fat | 0.1g | 0.1g |
| Fiber | 0.5g | 1.7g |
| Sugar | 1.7g | 4.2g |
| Sodium | 2mg | 4mg |
Green marks the more favorable value (fewer calories/sugar/sodium, more protein/fiber).
Key Takeaways
- Cucumber has 25 fewer calories per 100g than Onion (167% less).
- Onion delivers more protein (1.1g vs 0.7g per 100g).
- Onion has more fiber (1.7g vs 0.5g).
- Cucumber has less sugar (1.7g vs 4.2g).
Cucumber
Cucumber is over 95% water and provides minimal calories — perfect for hydration-focused, high-volume eating. Despite the low calorie count, it supplies vitamin K and small amounts of magnesium and potassium. The skin contains most of the fiber.
View Cucumber nutrition →Onion
Onions are low in calories and a notable source of quercetin, an antioxidant flavonoid, plus prebiotic fibers that feed gut bacteria. Their sulfur compounds — released when chopped — are being studied for cardiovascular benefits.
View Onion nutrition →Track Cucumber & Onion in Kairo
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