Per portion: 18 kcal
Protein: 0.78 g
Carbs: 4.36 g
Fat: 0.13 g
Fibre: 0.6 g

Your portion

18kcal · 78 kJ

Protein: 0.78 g
Carbs: 4.36 g
Fat: 0.13 g

A cup of sliced cucumber with the peel is mostly water, at over 95 grams per 100 grams, which is why a full 120-gram portion only comes to 18 calories. It is very low in fat and provides a modest 0.6 grams of fibre, with about 2 grams of natural sugars. The standout is vitamin K, giving you 16.4 micrograms, or 22% of the daily reference, alongside small amounts of protein and carbohydrates.

A normal portion is a full cup, and it works well as a hydrating, crunchy snack on its own or alongside a meal to add volume without many calories. It fits nicely before training if you want something light, but it is not filling on its own, so pair it with hummus, cheese, or a handful of nuts to round out the meal. There is no real caveat here, just keep in mind its low calorie density means you will need other foods to meet your energy needs.

Nutrition claims, per 100 g:

Source Vitamin K · 22% Low fat

Full nutrition

Nutrition

per 1 cup sliced (120 g)

Energy	18 kcal	0.9%
Energy	78 kJ	0.9%
Protein	0.78 g	1.6%
Carbohydrates	4.36 g	1.7%
of which sugars	2.0 g	2.2%
Starch	1.0 g
Fibre	0.6 g	2.4%
Fat	0.13 g	0.2%
of which saturates	0.04 g	0.2%
Monounsaturated	0.01 g
Polyunsaturated	0.04 g
Trans fat	0.0 g
Cholesterol	0.0 mg
Water	114.28 g
Ash	0.46 g

Sugar breakdown

Sucrose 0.04 g

Glucose 0.91 g

Fructose 1.04 g

Lactose 0.0 g

Maltose 0.01 g

Galactose 0.0 g

Minerals

Potassium 176.4 mg 8.8%

Calcium 19.2 mg 2.4%

Magnesium 15.6 mg 4.2%

Phosphorus 28.8 mg 4.1%

Sodium 2.4 mg

Iron 0.34 mg 2.4%

Zinc 0.24 mg 2.4%

Copper 0.05 mg 5.0%

Manganese 0.09 mg 4.5%

Selenium 0.36 µg 0.7%

Fluoride 1.56 µg

Vitamins

Vitamin A (RAE) 6.0 µg 0.8%

Vitamin C 3.36 mg 4.2%

Vitamin D 0.0 µg

Vitamin E 0.04 mg 0.3%

Vitamin K 19.68 µg 26.2%

Thiamin (B1) 0.03 mg 2.7%

Riboflavin (B2) 0.04 mg 2.9%

Niacin (B3) 0.12 mg 0.8%

Pantothenic acid (B5) 0.31 mg 5.2%

Vitamin B6 0.05 mg 3.6%

Folate (B9) 8.4 µg 4.2%

Vitamin B12 0.0 µg

Choline 7.2 mg

Beta-carotene 54.0 µg

Fatty acids

Omega-3 (EPA) 0.0 g

Omega-3 (DHA) 0.0 g

Amino acids

Tryptophan 0.01 g

Leucine 0.03 g

Isoleucine 0.03 g

Valine 0.03 g

Lysine 0.01 g

Nutrition from USDA FoodData Central (public domain), scaled to the stated portion. Reference intakes: EU Regulation 1169/2011. Percentages track your portion; claim badges are per 100 g (Reg. 1169/2011, 1924/2006).

How it compares

Against 832 other foods in “Vegetables and Vegetable Products”, per 100 g. The mark is this food; the faint line is the category median.

Energy 15.0 · higher than 5%

Protein 0.65 · higher than 5%

Fibre 0.5 · higher than 1%

Common portions

cup slices — 52 g (8 kcal)
cucumber (8-1/4") — 301 g (45 kcal)

Sources

USDA FoodData Central — Cucumber, with peel, raw — Nutrition values for Cucumber, with peel, raw.

Jan Horák — Founder & Engineer, Kaloria

Jan Horák is the founder and lead engineer of Kaloria, an AI-powered calorie and nutrition tracking app for iOS and Android. He builds and ships the app's photo and voice food-logging pipeline himself and writes about the nutrition math, product tradeoffs, and app-comparison data behind it.

Cucumber Slices