How many calories are in cucumber?
1/2 cup of cucumber (slices, 1.8 oz, 52 g) has 7 calories. One cucumber (10.6 oz, 301 g) has 42 calories. Per 3.5 oz (100 g): 14 calories.
Numbers are for the USDA entry Cucumber, with peel, raw. Other forms are compared below.
Calories in cucumber by size and measure
| Measure | Weight | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|---|
| 1/2 cup slices | 1.8 oz (52 g) | 7 calories | 0.33 g | 1.5 g | 0.09 g |
| 1 cucumber | 10.6 oz (301 g) | 42 calories | 1.9 g | 8.9 g | 0.53 g |
| 1 oz | 28 g | 4 calories | 0.18 g | 0.84 g | 0.05 g |
| 100 g | 3.5 oz | 14 calories | 0.62 g | 3 g | 0.18 g |
Weights are the household measures USDA lists for this exact food.
Where the calories come from
1/2 cup of cucumber (slices, 1.8 oz, 52 g) has:
- Protein: 0.33 g per serving, about 16% of calories
- Carbs: 1.5 g per serving, about 74% of calories
- Fat: 0.09 g per serving, about 10% of calories
Shares use 4 calories per gram of protein and carbs and 9 per gram of fat. USDA calculates total calories with factors specific to each food, so shares are approximate.
Raw, cooked and other forms
Per 100 g, the 4 USDA entries below range from 10 calories in cucumber, peeled, raw to 45 calories in cucumber, cooked.
| USDA entry | Per 100 g | Per serving | Water |
|---|---|---|---|
| Cucumber, with peel, raw | 14 calories | 7 calories per 1/2 cup (52 g) | 95.9% |
| Cucumber, peeled, raw | 10 calories | 7 calories per 1/2 cup (66.5 g) | 96.7% |
| Cucumber, raw | 16 calories | 10 calories per 1/2 cup (60 g) | 95.9% |
| Cucumber, cooked | 45 calories | 42 calories per 1/2 cup (92.5 g) | 91.9% |
Each row is a separate USDA entry with its own household measure. A dash means USDA lists no comparable measure for that entry.
How cucumber compares with other vegetables
Among the 50 vegetables people look up most, cucumber ranks 49th for calories per 3.5 oz (100 g) and 47th per typical serving.
| # | Food | Serving | Per serving | Per 100 g |
|---|---|---|---|---|
| 1 | Onion rings | 1 piece, 20.2 g | 58 calories | 288 calories |
| 2 | Garlic | 1 clove, 3 g | 4 calories | 143 calories |
| 3 | Potato salad | 1 cup, 250 g | 358 calories | 143 calories |
| … | ||||
| 7 | Potatoes | 1 medium potato, 173 g | 161 calories | 93 calories |
| 8 | Sweet potato | 1 medium, 114 g | 103 calories | 90 calories |
| … | ||||
| 15 | Carrots | 1 cup, 120 g | 53 calories | 44 calories |
| … | ||||
| 47 | Celery | 1 cup chopped, 101 g | 15 calories | 15 calories |
| 48 | Lettuce | 1 cup shredded, 72 g | 10 calories | 14 calories |
| 49 | Cucumber | 1/2 cup slices, 52 g | 7 calories | 14 calories |
| 50 | Pickles | 1 large, 135 g | 16 calories | 12 calories |
The list is the 50 vegetables most asked about in US searches for protein, calories, carbs, sugar and fiber, each as one USDA entry with its usual serving. Rows in between are skipped (…).
Keep exploring
Sources
Nutrients and household measures: USDA FoodData Central, April 2026 release (accessed 2026-10-14)
- Cucumber, with peel, raw: Cucumber, with peel, raw, FDC ID 2346406 (Foundation Foods, published 2022-10-28)
- Cucumber, peeled, raw: Cucumber, peeled, raw, FDC ID 169225 (SR Legacy, published 2019-04-01)
- Cucumber, raw: Cucumber, raw, FDC ID 2709784 (FoodData Central survey (FNDDS) 2024-10-31)
- Cucumber, cooked: Cucumber, cooked, FDC ID 2709928 (FoodData Central survey (FNDDS) 2024-10-31)
Comparison foods:
- Onion rings: Onion rings, breaded, par fried, frozen, prepared, heated in oven, FDC ID 324317
- Garlic: Garlic, raw, FDC ID 1104647
- Potato salad: Potato salad, home-prepared, FDC ID 169269
- Potatoes: Potatoes, baked, flesh and skin, without salt, FDC ID 170093
- Sweet potato: Sweet potato, cooked, baked in skin, flesh, without salt, FDC ID 168483
- Carrots: Carrots, raw, FDC ID 2709660
- Celery: Celery, raw, FDC ID 2346405
- Lettuce: Lettuce, iceberg, raw, FDC ID 2346388
- Pickles: Pickles, cucumber, dill or kosher dill, FDC ID 324653
How we calculate: every amount is the USDA value per 3.5 oz (100 g) scaled to the gram weight USDA lists for that measure. 1 oz = 28.35 g and 1 lb = 453.6 g. A dash (—) means USDA reports no value. How we verify.