Cucumber (100g) Calories & Carbs
Keto-friendlyLast updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 100g with skin (100g); per 100 g: 3.1g net carbs, 15 cal. Net carbs = total carbs − fiber − sugar alcohols — do the math for any label with the free net carbs calculator.
How many carbs are in cucumber (100g)?
Cucumber (100g) — 100g with skin (100g) — has 3.1g net carbs: 3.6g total carbs minus 0.5g fiber, plus 0.7g protein, 0.1g fat, and 15 calories. Per 100g that is 3.1g net carbs (3.6g total carbs, 0.5g fiber) and 15 calories. That makes cucumber (100g) relatively low in net carbs and lower than the typical vegetable, which averages about 17.9g net carbs per 100g. With this carb count, cucumber (100g) fits a keto or low-carb diet (usually 20–50g net carbs per day) in normal portions. Values are per 100 g, sourced from Manufacturer-reported values; net carbs are computed by CarbMeNot.
Is cucumber (100g) keto-friendly?
Yes, cucumber (100g) can fit a keto diet in moderate portions. 100g with skin (100g) is 3.1g net carbs (3.6g total carbs − 0.5g fiber); per 100g that is 3.1g net carbs. On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other vegetables and meals.
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Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 100g with skin | 3.1g | 3.6g | 0.7g | 15 |
| 100 g (3.5 oz) | 3.1g | 3.6g | 0.7g | 15 |
| 1 oz (28 g) | 0.9g | 1g | 0.2g | 4 |
How many calories are in cucumber (100g)?
Cucumber (100g) — 100g with skin (100g) — has 15 calories, with 0.7g protein, 0.1g fat, and 3.1g net carbs. Per 100g: 15 calories and 3.1g net carbs.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 15 |
| Total carbs | 3.6g |
| Net carbs | 3.1g |
| Fiber | 0.5g |
| Sugar | 1.7g |
| Sugar alcohols | 0g |
| Protein | 0.7g |
| Fat | 0.1g |
| Sodium | 2mg |
| Potassium | 147mg |
Source: Manufacturer-reported values (vegetables). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in cucumber (100g)?
- Cucumber (100g) (100g with skin, 100g) has 3.6g of total carbs and 3.1g of net carbs. Per 100 grams: 3.6g total, 3.1g net.
- How many net carbs are in cucumber (100g)?
- Cucumber (100g) has 3.1g of net carbs per 100g with skin (100g) — 3.6g total carbs minus 0.5g fiber.
- Is cucumber (100g) keto-friendly?
- Yes, cucumber (100g) can fit a keto diet in moderate portions. 100g with skin (100g) is 3.1g net carbs (3.6g total carbs − 0.5g fiber); per 100g that is 3.1g net carbs. On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other vegetables and meals.
- How many calories are in cucumber (100g)?
- Cucumber (100g) (100g with skin, 100g) has 15 calories; that is 15 calories per 100 grams.
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CarbMeNot provides general nutrition information, not medical advice. Values are estimates — verify before relying on them for any health decision. See our Medical Disclaimer.