Calories in cucumber
With peel, raw. 15 kcal (63 kJ) per 100 g. Choose a portion below and every figure on the page updates.
Cucumber is one of the lowest-energy foods there is, at 15 kcal (63 kJ) per 100 g with the peel on. It is about 95% water, and the small amount of energy it does have comes mostly from natural sugars and a little starch. Its value is volume and crunch rather than nutrients, though the peel contributes a useful amount of vitamin K.
Where the energy comes from
Share of total energy contributed by each macronutrient, using the standard 4/4/9 kcal per gram factors:
Full nutrition breakdown
Values shown for 52 g.
| Nutrient | Amount | % Daily Value |
|---|---|---|
| Energy | 8 kcal | – |
| Energy | 33 kJ | – |
| Protein | 0.3 g | <1% |
| Total fat | 0.1 g | <1% |
| Saturated | 0.02 g | <1% |
| Monounsaturated | 0 g | – |
| Polyunsaturated | 0.02 g | – |
| Trans | 0 g | – |
| Cholesterol | 0 mg | 0% |
| Total carbohydrate | 1.9 g | <1% |
| Sugars | 0.87 g | – |
| Starch | 0.43 g | – |
| Fibre | 0.3 g | <1% |
| Water | 49.5 g | – |
| Vitamins | ||
| Vitamin A | 2.6 µg | <1% |
| Vitamin C | 1.5 mg | 2% |
| Vitamin E | 0.016 mg | <1% |
| Vitamin K | 8.5 µg | 7% |
| Thiamin (B1) | 0.014 mg | 1% |
| Riboflavin (B2) | 0.017 mg | 1% |
| Niacin (B3) | 0.051 mg | <1% |
| Pantothenic acid (B5) | 0.135 mg | 3% |
| Vitamin B6 | 0.021 mg | 1% |
| Folate | 3.6 µg | <1% |
| Choline | 3.1 mg | <1% |
| Minerals | ||
| Calcium | 8.3 mg | <1% |
| Iron | 0.146 mg | <1% |
| Magnesium | 6.8 mg | 2% |
| Phosphorus | 12.5 mg | <1% |
| Potassium | 76.4 mg | 2% |
| Sodium | 1 mg | <1% |
| Zinc | 0.104 mg | <1% |
| Copper | 0.021 mg | 2% |
| Manganese | 0.041 mg | 2% |
| Selenium | 0.156 µg | <1% |
Daily Values are the FDA reference intakes for adults and children aged 4 and over, based on a 2,000 kcal diet. They are a labelling standard, not a personal target.
Common portions
| Portion | Grams | kcal | kJ | Protein g | Carbs g | Fat g |
|---|---|---|---|---|---|---|
| 1/2 cup, sliced | 52 | 8 | 33 | 0.3 | 1.9 | 0.1 |
| 1 whole cucumber (8 in) | 301 | 45 | 189 | 2 | 10.9 | 0.3 |
| 1 cup, sliced | 104 | 16 | 65 | 0.7 | 3.8 | 0.1 |
Things worth knowing
- A whole 8-inch cucumber weighs about 301 g and has roughly 45 kcal (189 kJ). A cup of slices (104 g) has about 16 kcal (65 kJ), and half a cup about 8 kcal.
- Peeling lowers the energy slightly, to about 10 kcal per 100 g, but it also removes more than half the vitamin K: 16.4 µg per 100 g with peel versus 7.2 µg peeled.
- A whole unpeeled cucumber supplies about 49 µg of vitamin K, around 40% of the Daily Value, which is the main micronutrient worth noting here.
- Because it is mostly water, cucumber's calories barely change whether you slice, spiralise or blend it. Dressings and dips are where the energy in a cucumber salad comes from.
Converting these figures
One 1/2 cup, sliced of cucumber is 8 kcal, which is 33 kJ. To convert any other figure, divide kilojoules by 4.184 for calories, or use the converter on the home page.
It takes 1,593 g of cucumber to reach 1,000 kJ (239 kcal). See how that compares with other foods on the 1000 kJ to calories page.
Similar foods
Compare all 39 vegetables in one table →
Source: USDA FoodData Central, SR Legacy 11205. Values are averages; individual samples vary with variety, growing conditions, and preparation.