A typical serving of cucumber (1 cucumber, 301 g) has about 45 calories. Per 100 g: 15 kcal, 0.7 g protein, 3.6 g carbs, 0.1 g fat. The same 100 g carries 0.5 g of fiber and 1.7 g of sugar. In a daily log it contributes close to nothing.
| Serving | Weight | Calories |
|---|---|---|
| 1 cucumber | 301 g | 45 kcal |
| 1/2 cup slices | 52 g | 8 kcal |
| 100 g | 100 g | 15 kcal |
About 95% water; you could eat an entire large cucumber for under 50 calories. On the energy-density scale, 15 kcal per 100 g puts cucumber at the very low end.
A typical serving (1 cucumber, 301 g) has about 45 calories, and 100 g has 15 kcal. Calories scale with weight, so double the portion means double the number.
There are 0.7 g of protein in 100 g of cucumber, which works out to about 2.1 g per serving (1 cucumber). Treat it as an energy source rather than a protein source.
There are 3.6 g of carbohydrate per 100 g of cucumber, or about 11 g in 1 cucumber (301 g).
Every value on this page comes from USDA FoodData Central, entry 168409 (SR Legacy). Serving figures are converted from the per-100-g data, so rounding can shift a total by a calorie or two.
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Get JoulesA note on accuracy: calculators like this one provide estimates based on population-level formulas — your real needs vary with genetics, muscle mass, medical conditions, and more. Results are for information only and are not medical advice, a diagnosis, or a prescription. Talk to a doctor or registered dietitian before making significant changes to your diet or exercise, especially if you have a health condition, are pregnant, or are under 18.
Nutrition data: USDA FoodData Central, FDC ID 168409 (SR Legacy). Serving calories are computed from the per-100-g values.
