Cucumber (Medium, Whole) Calories & Carbs
Keto-friendlyLast updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 1 medium cucumber (300g); per 100 g: 3g 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 (medium, whole)?
Cucumber (Medium, Whole) — 1 medium cucumber (300g) — has 9g net carbs: 11.1g total carbs minus 2.1g fiber, plus 2.1g protein, 0g fat, and 45 calories. Per 100g that is 3g net carbs (3.7g total carbs, 0.7g fiber) and 15 calories. That makes cucumber (medium, whole) 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 (medium, whole) 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 (medium, whole) keto-friendly?
Cucumber (Medium, Whole) is borderline for keto — it works only in small portions. 1 medium cucumber (300g) is 9g net carbs (11.1g total carbs − 2.1g fiber); per 100g that is 3g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
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Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 1 medium cucumber | 9g | 11.1g | 2.1g | 45 |
| 100 g (3.5 oz) | 3g | 3.7g | 0.7g | 15 |
| 1 oz (28 g) | 0.8g | 1g | 0.2g | 4 |
How many calories are in cucumber (medium, whole)?
Cucumber (Medium, Whole) — 1 medium cucumber (300g) — has 45 calories, with 2.1g protein, 0g fat, and 9g net carbs. Per 100g: 15 calories and 3g net carbs.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 15 |
| Total carbs | 3.7g |
| Net carbs | 3g |
| Fiber | 0.7g |
| Sugar | 1.7g |
| Sugar alcohols | 0g |
| Protein | 0.7g |
| Fat | 0g |
| 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 (medium, whole)?
- Cucumber (Medium, Whole) (1 medium cucumber, 300g) has 11.1g of total carbs and 9g of net carbs. Per 100 grams: 3.7g total, 3g net.
- How many net carbs are in cucumber (medium, whole)?
- Cucumber (Medium, Whole) has 9g of net carbs per 1 medium cucumber (300g) — 11.1g total carbs minus 2.1g fiber.
- Is cucumber (medium, whole) keto-friendly?
- Cucumber (Medium, Whole) is borderline for keto — it works only in small portions. 1 medium cucumber (300g) is 9g net carbs (11.1g total carbs − 2.1g fiber); per 100g that is 3g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
- How many calories are in cucumber (medium, whole)?
- Cucumber (Medium, Whole) (1 medium cucumber, 300g) has 45 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.