Vegetables
How many calories in a cucumber?
One whole raw cucumber with peel (301 g) has 45 calories, with 2 g of protein, 10.9 g of carbs and 0.3 g of fat. That is 15 calories per 100 g.
Raw cucumber with peel. Data: USDA FoodData Central, “Cucumber, with peel, raw”. The whole-cucumber measure is USDA’s 8¼-inch cucumber, not a fixed weight for every cucumber. Half a cucumber and a full cup are calculated shares of USDA measures. Weigh the edible portion with peel for a different size.
Serving size
1 whole cucumber (8¼ inches) · 301 g
45 calories
- Protein
- 2 g14% of calories · 4% DV
- Carbs
- 10.9 g80% of calories · 4% DV
- Fat
- 0.3 g5% of calories · 0% DV
- Fiber
- 1.5 g
- Sugars
- 5 g
- Saturated fat
- 0.1 g
- Sodium
- 6 mg
Calories in cucumber by serving
| Serving | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 1 whole cucumber (8¼ inches)301 g | 45 | 2 g | 10.9 g | 0.3 g |
| ½ cucumber150.5 g | 23 | 1 g | 5.5 g | 0.2 g |
| 1 cup, sliced104 g | 16 | 0.7 g | 3.8 g | 0.1 g |
| 100 g100 g | 15 | 0.7 g | 3.6 g | 0.1 g |
Serving weights are USDA’s household measures for this food.
Cucumber nutrition facts
Per 100 g, 15 calories: 14% from protein, 80% from carbs and 5% from fat.
| Nutrient | Per 100 g | Per serving1 whole cucumber (8¼ inches) · 301 g | % Daily Value |
|---|---|---|---|
| Calories | 15 | 45 | – |
| Total fat | 0.1 g | 0.3 g | 0% |
| Saturated fat | 0 g | 0.1 g | 1% |
| Cholesterol | 0 mg | 0 mg | 0% |
| Sodium | 2 mg | 6 mg | 0% |
| Total carbohydrate | 3.6 g | 10.9 g | 4% |
| Dietary fiber | 0.5 g | 1.5 g | 5% |
| Total sugars | 1.7 g | 5 g | – |
| Protein | 0.7 g | 2 g | 4% |
| Vitamin D | 0 µg | 0 µg | 0% |
| Calcium | 16 mg | 48.2 mg | 4% |
| Iron | 0.3 mg | 0.8 mg | 5% |
| Potassium | 147 mg | 442.5 mg | 9% |
| Vitamin A | 5 µg | 15.1 µg | 2% |
| Vitamin C | 2.8 mg | 8.4 mg | 9% |
% Daily Value is per serving (1 whole cucumber (8¼ inches)), using the FDA’s Daily Values. Calorie shares use 4 calories per gram of protein and carbs and 9 per gram of fat.
Whole cucumber or mini cucumber?
The whole portion above is USDA’s 301 g cucumber with peel. Half is calculated as 301 ÷ 2 = 150.5 g; a cup of slices is 2 × USDA’s 52 g half-cup = 104 g. A smaller cucumber needs its own edible weight. Our mini cucumber estimate uses the same generic record by weight, without claiming a mini-specific cultivar or standard whole-mini weight.
How long to walk it off
Walking at 3 mph, a 150-lb adult burns about 3.2 calories a minute on top of what they would burn at rest. So one whole raw cucumber with peel (45 calories) takes about 14 minutes of walking, roughly 1,600 steps.
Compare calories by serving
One whole raw cucumber with peel has 45 calories, 41 more calories than a 1 oz serving of mini cucumber (4 calories). The portions weigh 301 g and 28.3 g, respectively.
Related foods to explore
Cucumber questions
How many calories are in a cucumber?
One whole raw cucumber with peel (301 g) has 45 calories: 0.3 g fat, 10.9 g carbs (1.5 g of it fiber) and 2 g protein.
How many calories in cucumber slices?
One cup of raw cucumber slices with peel (104 g) has 16 calories: 0.1 g fat, 3.8 g carbs (0.5 g of it fiber) and 0.7 g protein.
How many calories are in half a cucumber?
Half a raw cucumber with peel (150.5 g) has 23 calories: 0.2 g fat, 5.5 g carbs (0.8 g of it fiber) and 1 g protein.
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- U.S. Department of Agriculture, FoodData Central: Cucumber, with peel, raw (FDC ID 168409, SR Legacy, published 2019-04-01).
- Official SR Legacy CSV retrieved October 26, 2026; record and household measures verified October 29, 2026. Nutrition amounts are calculated as the USDA value per 100 g × serving grams ÷ 100, then rounded half up: whole calories and at most one decimal for g or mg.
- U.S. Food and Drug Administration. Daily Value on the Nutrition and Supplement Facts Labels.
- Walking time: the method of our walking calorie calculator (2024 Adult Compendium of Physical Activities; CADENCE-Adults for steps).
Prepared by the KaloCam team · Updated