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Calories in Cucumber Per Serving

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Caloric Values, Single Serving

One half a cup of sliced cucumber in its raw state contains 8 calories. You're likely to use more calories consuming this healthy vegetable than it contains, thus the reason why it's considered a 'free food'.

One cucumber that is about eight inches in length holds about 45 calories.

Both of the above numbers are based on a specimen with the skin still in place.

Health & Nutrition Notes for Cucumber

The most impressive area of nutritional value for this vegetable is the potassium content of about 75 milligrams per 1/2 cup.

It also holds about 1.5 milligrams of Vitamin C.

It is interesting that the eight inch cucumber contains more than five grams of sugar (natural).

Nutrition Information for Cucumber

Vitamins, Minerals


1/2 Cup Slices, Raw

Energy Values kcal 8
Protein g 0.34
Total lipid (fat) g 0.06
Carbohydrate, by difference g 1.89
Fiber, total dietary g 0.3
Calcium, Ca mg 8
Iron, Fe mg 0.15
Magnesium, Mg mg 7
Phosphorus, P mg 12
Potassium, K mg 76
Sodium, Na mg 1
Zinc, Zn mg 0.10
Vitamin C, total ascorbic acid mg 1.5


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