Cucumber calories, whole, sliced or peeled
A whole cucumber has 45 calories
A whole cucumber with the peel on has 45 calories. Half a cucumber has 23, and a cup of slices has 16.
USDA's whole cucumber weighs 301 g. If yours looks bigger or smaller, the length in the portion table helps you match it.
USDA FoodData Central. Cucumber, with peel, raw. Source checked September 29, 2026.
Whole, halved or sliced
Half a cup of slices is 52 g and 8 calories. The two peeled rows at the bottom are for cucumber with the skin taken off.
| Portion | Weight | Calories kcal | Protein g | Carbs g | Fat g | Fiber g | Sugar g | Sodium mg | Caffeine mg | Portion source |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 whole cucumber with peel | 301 g | 45 | 2 | 10.9 | 0.3 | 1.5 | 5 | 6 | 0 | USDA portion, 1 cucumber, 8 1/4 inches |
| Half a cucumber with peel | 150.5 g | 23 | 1 | 5.5 | 0.2 | 0.8 | 2.5 | 3 | 0 | Half a cucumber, computed from USDA's 1 cucumber, 8 1/4 inches |
| 1 cup of slices with peel | 104 g | 16 | 0.7 | 3.8 | 0.1 | 0.5 | 1.7 | 2.1 | 0 | 1 cup of slices, computed from USDA's half a cup of slices |
| Half a cup of slices with peel | 52 g | 8 | 0.3 | 1.9 | 0.1 | 0.3 | 0.9 | 1 | 0 | USDA portion, half a cup of slices |
| 1 medium peeled cucumber | 201 g | 20 | 1.2 | 4.3 | 0.3 | 1.4 | 2.8 | 4 | 0 | USDA portion, 1 medium |
| 1 cup of peeled slices | 119 g | 12 | 0.7 | 2.6 | 0.2 | 0.8 | 1.6 | 2.4 | 0 | USDA portion, 1 cup, sliced |
USDA FoodData Central. Cucumber, with peel, raw. USDA FoodData Central. Cucumber, peeled, raw. Source checked September 29, 2026.
What's in a whole cucumber
A whole cucumber has 10.9 g of carbs, 5 g of sugar, 2 g of protein and 1.5 g of fiber, with barely any fat.
Cucumber rarely makes a meal on its own. For the rest of the plate, broccoli, corn, sweet potato and baked potato each have their own page, and every other food is in the calorie references.
| Nutrient | 1 whole cucumber with peel | Per 100 g |
|---|---|---|
| Calories | 45 kcal | 15 kcal |
| Protein | 2 g | 0.7 g |
| Carbs | 10.9 g | 3.6 g |
| Fat | 0.3 g | 0.1 g |
| Fiber | 1.5 g | 0.5 g |
| Sugar | 5 g | 1.7 g |
| Sodium | 6 mg | 2 mg |
- Calories in broccoli
- Calories in corn
- Calories in sweet potato
- Calories in a baked potato
- Calories in cauliflower
- Calories in tomato
- All calorie references
USDA FoodData Central. Cucumber, with peel, raw. Source checked September 29, 2026.
Peeled cucumber has fewer calories
Peeled cucumber has 10 calories per 100 g, against 15 for cucumber with the peel. Cucumber with the peel has 3.6 g of carbs per 100 g, and peeled cucumber has 2.2 g.
A medium peeled cucumber weighs 201 g and has 20 calories, and a cup of peeled slices has 12.
| Preparation | Weight | Calories kcal | Protein g | Carbs g | Fat g | Fiber g | Sugar g | Sodium mg | Caffeine mg |
|---|---|---|---|---|---|---|---|---|---|
| Raw cucumber with the peel | 100 g | 15 | 0.7 | 3.6 | 0.1 | 0.5 | 1.7 | 2 | 0 |
| Raw cucumber peeled | 100 g | 10 | 0.6 | 2.2 | 0.2 | 0.7 | 1.4 | 2 | 0 |
USDA FoodData Central. Cucumber, with peel, raw. USDA FoodData Central. Cucumber, peeled, raw. Source checked September 29, 2026.
Trim the ends, then weigh
Cut off the ends, weigh the cucumber you'll eat and enter the grams. The calculator uses cucumber with the peel. For peeled cucumber, use 10 calories per 100 g from the comparison above.
Tossed it into a salad with other things? Tell TrueCal what was in the bowl and review the estimate.
301 g has about 45.1 calories.
USDA FoodData Central. Cucumber, with peel, raw. Source checked September 29, 2026.
How many kcal does cucumber have per 100 g?
Cucumber with the peel has 15 kcal per 100 g. Peeled cucumber has 10.
USDA FoodData Central. Cucumber, with peel, raw. USDA FoodData Central. Cucumber, peeled, raw. Source checked September 29, 2026.
Does cucumber have any protein?
A little. A whole cucumber with the peel has 2 g of protein, and a cup of slices has 0.7 g.
USDA FoodData Central. Cucumber, with peel, raw. Source checked September 29, 2026.
Log the portion you ate
Add food from a photo or a sentence, then check the portion before saving.
USDA FoodData Central. Cucumber, with peel, raw. USDA FoodData Central. Cucumber, peeled, raw. Source checked September 29, 2026.