22 kcal P 0.7g C 3.84g F 0.43g
🥦 Vegetables and Vegetable Products
Calories in Cucumber
96% water and technically a fruit — yet almost always eaten like a vegetable
16 kcal
What makes cucumber so powerful?
Cucumbers are botanically fruits, since they develop from a flower and contain seeds, but culinarily and nutritionally they're treated as vegetables, similar to tomatoes. They're roughly 96% water by weight, among the highest of any commonly eaten produce, which is part of why they're so low in calories per volume — almost everything you're eating, by mass, is water rather than carbohydrate or fat. Cucumber skin holds a meaningful share of the fruit's fiber and a notable amount of vitamin K, which is why peeled cucumbers test measurably lower in both than unpeeled ones, and why the bitter compounds some cucumbers have, called cucurbitacins, are also concentrated mostly near the skin.
~96% water by weight
One of the most water-dense foods commonly eaten, explaining its very low calorie density.
Most fiber and vitamin K are in the skin
Peeling removes a real share of both nutrients.
Botanically a fruit, used as a vegetable
Classified the same way tomatoes are — fruit by biology, vegetable by use.
💡 When & how to use it
Leave the skin on when the cucumber isn't waxed or bitter, to keep more fiber and vitamin K. If a cucumber tastes bitter, that's concentrated cucurbitacin near the stem end and skin — peeling and trimming that section reduces the bitterness.
Calories by Serving Size
100g
16 kcal
P 0.63g C 2.95g F 0.18g
1 RACC (85g)
14 kcal
P 0.5g C 2.5g F 0.2g
200g
32 kcal
P 1.3g C 5.9g F 0.4g
50g
8 kcal
P 0.3g C 1.5g F 0.1g
Full Nutrition Facts
Per 100g — daily values based on a 2,000 calorie diet
Nutrition Facts
Serving size: 100g
Calories 16
% Daily Value*
Total Fat 0.18g 0%
Sodium 1.52mg 0%
Total Carbohydrate 2.95g 1%
Protein 0.63g 1%
Calcium 16.3mg 1%
Iron 0mg 0%
Potassium 170mg 4%
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
How does Cucumber fit your daily goals?
3 min
Walking to burn 16 kcal
1%
of 2,000 kcal daily goal
0.63g
protein (1% of daily 50g)
125
servings until 2,000 kcal
Log Cucumber in CalRay — just snap a photo
CalRay's AI recognizes cucumber and hundreds of thousands of other foods from a photo. No manual lookup needed.
Frequently Asked Questions
How many calories are in Cucumber?
Cucumber contains 16 calories per 100g. A standard serving of 1 RACC (85g) provides 14 calories. It is considered a very low-calorie food (under 50 kcal/100g), making it excellent for weight management.
How much protein does Cucumber have?
Cucumber provides 0.63g of protein per 100g, which is 1% of the 50g daily recommended value. It is not a primary protein source.
How many carbs are in Cucumber?
Cucumber contains 2.95g of carbohydrates per 100g .
Is Cucumber good for weight loss?
Yes! Cucumber is very low in calories (16 kcal/100g) and can be eaten in generous portions even on a calorie-restricted diet.
How do I track Cucumber calories accurately?
The easiest way to track cucumber is with CalRay. Simply snap a photo of your meal and the AI will automatically identify the food and calculate calories and macros based on the estimated portion size — no manual lookup required. You can also search by name and adjust gram weight manually.
🍽️ Perfectly Pairs With Cucumber
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61 kcal P 10.3g C 3.64g F 0.37g
3 kcal P 0.87g