Calories in Cucumber

Q: How much sugar does cucumber have?

100 g of cucumber has 1.7 g of sugar.

Q: How many calories in each size of cucumber?

It depends on the size: slice (10 g) about 2 kcal; whole (301 g) about 48 kcal.

Q: Is cucumber low in calories?

Yes. 100 g of cucumber has only 16 kcal.

Q: Which vitamins and minerals is cucumber rich in?

100 g of cucumber covers this much of an adult's daily need: vitamin K 32%.

Q: Is cucumber vegan?

Yes, fully plant-based with no animal products.

Q: Will eating cucumber help me lose weight?

It can be part of a diet that loses weight: what counts is the total calories you eat in a day, not any single food. 100 g of cucumber has 16 kcal. The calorie calculator works out how many you need.

100 g of cucumber has 16 kcal, and 1 slice of cucumber (10 g) has about 2 kcal.

16 kcalper 100 g

2 kcal in 1 piece/slice (10 g)

Very low density · 0.16 kcal per g

Protein 0.6g 16% of the calories
Carbs 3g 74% of the calories
Fat 0.2g 10% of the calories
Fiber 0.5g

Per 100 g. Figures from USDA FoodData Central. Averages across measured samples; a few percent either way is normal. Updated 2026-10-04.

100 g is about 4 minutes of walking, or 1 minutes of running, for a 70 kg body - context, not a debt to work off.

Cucumber nutrition facts

A dash means nobody measured it - not that there is none of it.

Per serving: 1 piece/slice (10 g)
Nutrient	Per 100 g	Per serving
Energy	16kcal	2kcal
Fat	0.18g	0.018g
Saturated Fat	0.04g	0.004g
Unsaturated Fat	0.14g	0.014g
Carbs	3g	0.3g
Sugars	1.7g	0.17g
Fiber	0.5g	0.05g
Protein	0.62g	0.062g
Salt	0.01g	0.001g
Water	95.9g	9.6g

Alcohol	0g	0g
Caffeine	0mg	0mg

Monounsaturated	0.005g	0.001g
Polyunsaturated	0.032g	0.003g
Omega-3	0.005g	0.001g
ALA	0.005g	0.001g
DHA	0g	0g
EPA	0g	0g
Omega-6	0.028g	0.003g
AA	0g	0g
LA	0.028g	0.003g
Cholesterol	0mg	0mg

Vitamin B1 (Thiamine)	0.027mg	0.003mg
Vitamin B2 (Riboflavin)	0.033mg	0.003mg
Vitamin B3 (Niacin)	0.098mg	0.01mg
Vitamin B6 (Pyridoxine)	0.04mg	0.004mg
Vitamin B12 (Cobalamin)	0µg	0µg
Folate (Vitamin B9)	7µg	0.7µg
Vitamin A	5µg	0.5µg
Vitamin C	2.8mg	0.28mg
Vitamin D	0IU	0IU
Vitamin E	0.03mg	0.003mg
Vitamin K	24µg	2.4µg
Choline	6mg	0.6mg

Calcium	16mg	1.6mg
Copper	0.063mg	0.006mg
Iron	0mg	0mg
Magnesium	10mg	1mg
Phosphorus	23mg	2.3mg
Potassium	170mg	17mg
Selenium	0.3µg	0.03µg
Zinc	0.2mg	0.02mg

Beta-carotene	45µg	4.5µg
Lycopene	0µg	0µg
Lutein + zeaxanthin	23µg	2.3µg
Flavonoids	0.17mg	0.017mg
Flavonols	0.17mg	0.017mg

Cystine	0.004g	0g
Histidine	0.01g	0.001g
Isoleucine	0.02g	0.002g
Leucine	0.028g	0.003g
Lysine	0.028g	0.003g
Methionine	0.006g	0.001g
Phenylalanine	0.018g	0.002g
Threonine	0.018g	0.002g
Tryptophan	0.005g	0.001g
Tyrosine	0.01g	0.001g
Valine	0.021g	0.002g

Read it as an averageIt is what a laboratory measured, averaged over samples - variety, ripeness and cut all move it, and a few percent either way is normal.

What stands out in cucumber

1 piece/slice (10 g) is 2 kcal, about <1% of a 2,000 kcal day.

High in vitamin K24 µg per 100 g (32% of the daily reference)
Low in calories16 kcal per 100 g
Low in fat0.18 g per 100 g
Low in saturated fat0.04 g per 100 g
Low in sugars1.7 g per 100 g

Claims follow the EU nutrition claims rules and the "high" warnings the UK/EU front-of-pack labels; the 2,000 kcal day is the reference intake for an average adult.

Calories in different amounts of cucumber

10 g1 piece/slice	2 kcal
28 g1 oz	4 kcal
50 g	8 kcal
100 g	16 kcal
200 g	32 kcal

Any amount g 2 kcal

Foods with similar calories

Other published foods within reach of 16 kcal per 100 g, so the number has something to sit against.

Broccoli 15 kcal more 31kcal / 100 g

Spinach 11 kcal more 27kcal / 100 g

Tomatoes 4 kcal more 20kcal / 100 g

Lettuce 4 kcal more 20kcal / 100 g

Onion 22 kcal more 38kcal / 100 g

Asparagus 4 kcal more 20kcal / 100 g

Questions about cucumber

100 g of cucumber has 1.7 g of sugar.

It depends on the size: slice (10 g) about 2 kcal; whole (301 g) about 48 kcal.

Yes. 100 g of cucumber has only 16 kcal.

100 g of cucumber covers this much of an adult's daily need: vitamin K 32%.

Yes, fully plant-based with no animal products.

It can be part of a diet that loses weight: what counts is the total calories you eat in a day, not any single food. 100 g of cucumber has 16 kcal. The calorie calculator works out how many you need.

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