How Many Calories in a Cucumber? Nutrition Facts & Macros
A medium cucumber (201g) has 30 calories
Protein 1.3g · Carbs 7.3g · Fat 0.2g
Cucumbers are one of the lowest-calorie foods you can eat — crisp, refreshing, and made up almost entirely of water. Whether you're adding them to a salad, making a snack, or tracking your macros, knowing the exact nutrition facts helps. Here's everything you need to know about cucumber calories and macros, based on USDA data. Raw cucumbers are about 95% water by weight — the highest among common vegetables.
63 kJ · per 100g · Water: 95.23 g
Calorie Calculator: Cucumber
201 g Cucumber contains 30 kcal
Calories by Portion Size
| Portion | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 1 medium cucumber (201g) | 30 kcal | 1.3g | 7.3g | 0.2g |
| 1 cup sliced (119g) | 18 kcal | 0.8g | 4.3g | 0.1g |
| 1/2 cucumber (100g) | 15 kcal | 0.7g | 3.6g | 0.1g |
| 100 grams | 15 kcal | 0.7g | 3.6g | 0.1g |
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| Cucumber | per 100g |
|---|---|
| Calories | 15 kcal |
| Protein | 0.65 g |
| Fat | 0.11 g |
| Carbs | 3.63 g |
| Fiber | 0.5 g |
| Sugar | 1.67 g |
| Sodium | 2 mg |
| Potassium | 147 mg |
| Magnesium | 13 mg |
| Phosphorus | 24 mg |
| Vitamin C | 2.8 mg |
| Vitamin B6 | 0.04 mg |
| Folate | 7 mcg |
| Water | 95.23 g |
Source: USDA FoodData Central (FDC ID: 168409) · Data verified April 2026
Variations
Peeled cucumber
12 kcal per 100g — slightly less than with peel (15 kcal). Protein 0.59g, carbs 2.16g, fat 0.11g per 100g. Less fiber (0.3g vs 0.5g) and fewer vitamins. The peel is where most of the nutrients are concentrated.
Pickled cucumber (dill)
11 kcal per 100g — fewer calories than raw due to water exchange during pickling. But significantly higher sodium: 1208mg vs 2mg per 100g. Protein 0.33g, carbs 2.26g per 100g. Good for flavor but watch sodium intake.
Frequently Asked Questions
How many calories are in a cucumber?
A medium cucumber (201g, with peel) contains approximately 30 calories. Per 100g, raw cucumber has only 15 calories — one of the lowest-calorie foods that exists. One cup of sliced cucumber (119g) has about 18 calories. You'd need to eat over 6 cucumbers to reach 200 calories.
How many carbs are in a cucumber?
Per 100g, cucumber contains just 3.63g of carbohydrates, of which 1.67g is sugar and 0.5g is fiber. A medium cucumber (201g) has about 7.3g of carbs. With only ~3g net carbs per 100g, cucumber is one of the most keto-friendly vegetables.
Is cucumber good for weight loss?
Cucumber is one of the best foods for weight loss. At just 15 calories per 100g, it's nearly impossible to overeat. The 95% water content provides excellent hydration and volume, helping you feel full. A whole medium cucumber has only 30 calories — you can eat them freely without worrying about calories.
Is cucumber a fruit or a vegetable?
Like the tomato, cucumber is botanically a fruit (it grows from a flower and contains seeds). But in the kitchen and for nutrition purposes, it's treated as a vegetable. With only 1.67g of sugar per 100g and 15 calories, it has a nutritional profile typical of vegetables, not fruits.
How much water is in a cucumber?
Cucumbers are 95.23% water by weight — the highest water content among common vegetables and fruits. A medium cucumber (201g) contains about 191ml of water. This makes cucumbers excellent for hydration, especially during hot weather. Eating a cucumber is almost like drinking a glass of water with added nutrients.
Cucumber with peel vs peeled — what's the difference?
Cucumber with peel has 15 kcal per 100g, peeled has 12 kcal. The peel contains most of the fiber (0.5g vs 0.3g), vitamin K, and some additional nutrients. Leaving the peel on is recommended for maximum nutrition — just wash thoroughly. The calorie difference is negligible.
Compare with Similar Foods
| Portion | kcal | Protein | Carbs | Fat |
|---|---|---|---|---|
| Cucumber | 15 | 0.65g | 3.63g | 0.11g |
| Tomato | 18 | 0.88g | 3.89g | 0.2g |
| Watermelon | 30 | 0.61g | 7.55g | 0.15g |
| Carrot | 41 | 0.93g | 9.58g | 0.24g |
| Broccoli | 34 | 2.82g | 6.64g | 0.37g |
per 100g
Per 100g, cucumber has just 15 kcal — the lowest among common vegetables. Even lower than tomatoes (18 kcal), watermelon (30 kcal), and strawberries (32 kcal). Its 95% water content makes it the most hydrating vegetable.
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