Cucumber vs Zucchini: which is healthier?

Per 100g, Cucumber has 15 calories, 0.7g protein, 0.5g fiber, and 0.1g fat, while Zucchini has 19 calories, 1g protein, 0.8g fiber, and 0.2g fat. Their macros are close enough that either fits the same plan; pick based on preparation and what you pair them with.

Which has more calories, Cucumber or Zucchini?

Per 100g, Cucumber has 15 calories and Zucchini has 19 calories, a difference of 4 calories. In practical terms, 1 cup sliced (16 calories) of cucumber compares with 1 medium zucchini (29 calories) of zucchini.

Which has more protein, Cucumber or Zucchini?

Zucchini leads on protein with 1g per 100g; the gap is 0.3g per 100g (Cucumber 0.7g vs Zucchini 1g). If you are tracking protein targets, that difference compounds quickly across a full day of meals.

Which is better for a low-carb diet, Cucumber or Zucchini?

Zucchini has 3.3g of carbs per 100g compared to 3.8g in Cucumber, making Zucchini the easier fit for low-carb or keto plans. Fiber is 0.5g vs 0.8g per 100g, which also affects net carbs.

Can I substitute Cucumber for Zucchini?

Often, yes. Swapping zucchini for cucumber shifts your meal by about 4 calories and 0.3g of protein per 100g, so adjust portions if you are logging macros. Texture and cooking behavior differ more than nutrition in many recipes, so test the swap in small batches first.