Calories in Lemon

Q: How much fiber does lemon have?

1 fruit of lemon (65 g) has 1.8 g of fiber, and 100 g has 2.8 g.

Q: How much sugar does lemon have?

1 fruit of lemon (65 g) has 1.6 g of sugar, and 100 g has 2.5 g.

Q: How many calories in each size of lemon?

It depends on the size: slice (8 g) about 2 kcal; whole (65 g) about 19 kcal.

Q: Is lemon rich in vitamin C?

Yes. 100 g of lemon has 53 mg of vitamin C, 66% of what an adult needs in a day.

Q: Does lemon contain flavonoids?

Yes. 100 g of lemon has 53.4 mg of flavonoids, mostly flavanones.

Q: Is lemon low in calories?

Yes. 100 g of lemon has only 29 kcal.

Q: Will eating lemon 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. 1 fruit of lemon (65 g) has about 19 kcal. The calorie calculator works out how many you need.

100 g of lemon has 29 kcal, and 1 fruit of lemon (65 g) has about 19 kcal.

29 kcalper 100 g

19 kcal in 1 fruit (65 g)

Very low density · 0.29 kcal per g

Protein 1.1g 10% of the calories
Carbs 9.3g 84% of the calories
Fat 0.3g 6% of the calories
Fiber 2.8g

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 7 minutes of walking, or 3 minutes of running, for a 70 kg body - context, not a debt to work off.

Lemon nutrition facts

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

Per serving: 1 fruit (65 g)
Nutrient	Per 100 g	Per serving
Energy	29kcal	19kcal
Fat	0.3g	0.2g
Saturated Fat	0.04g	0.026g
Unsaturated Fat	0.26g	0.17g
Carbs	9.3g	6.1g
Sugars	2.5g	1.6g
Fiber	2.8g	1.8g
Protein	1.1g	0.72g
Salt	0.01g	0.006g
Water	89g	57.8g

Alcohol	0g	0g
Caffeine	0mg	0mg

Monounsaturated	0.011g	0.007g
Polyunsaturated	0.089g	0.058g
Omega-3	0.026g	0.017g
ALA	0.026g	0.017g
DHA	0g	0g
EPA	0g	0g
Omega-6	0.063g	0.041g
AA	0g	0g
LA	0.063g	0.041g
Cholesterol	0mg	0mg

Vitamin B1 (Thiamine)	0.04mg	0.026mg
Vitamin B2 (Riboflavin)	0.02mg	0.013mg
Vitamin B3 (Niacin)	0.1mg	0.065mg
Vitamin B6 (Pyridoxine)	0.08mg	0.052mg
Vitamin B12 (Cobalamin)	0µg	0µg
Folate (Vitamin B9)	11µg	7.2µg
Vitamin A	1µg	0.65µg
Vitamin C	53mg	34.5mg
Vitamin D	0IU	0IU
Vitamin E	0.15mg	0.098mg
Vitamin K	0µg	0µg
Choline	5.1mg	3.3mg

Calcium	26mg	16.9mg
Copper	0.037mg	0.024mg
Iron	0.6mg	0.39mg
Magnesium	8mg	5.2mg
Phosphorus	16mg	10.4mg
Potassium	138mg	89.7mg
Selenium	0.4µg	0.26µg
Zinc	0.06mg	0.039mg

Beta-carotene	3µg	2µg
Lycopene	0µg	0µg
Lutein + zeaxanthin	11µg	7.2µg
Flavonoids	53.4mg	34.7mg
Flavanones	49.8mg	32.4mg
Flavones	1.9mg	1.2mg
Flavonols	1.7mg	1.1mg

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 lemon

1 fruit (65 g) is 19 kcal, about <1% of a 2,000 kcal day.

High in vitamin C53 mg per 100 g (66% of the daily reference)
Low in calories29 kcal per 100 g
Low in fat0.3 g per 100 g
Low in saturated fat0.04 g per 100 g
Low in sugars2.5 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 lemon

50 g	14 kcal
65 g1 fruit	19 kcal
100 g	29 kcal
130 g2 servings	38 kcal
200 g	58 kcal

Any amount g 19 kcal

Foods with similar calories

Other published foods within reach of 29 kcal per 100 g, so the number has something to sit against.

Orange 21 kcal more 50kcal / 100 g

Watermelon 1 kcal more 30kcal / 100 g

Raspberries 22 kcal more 51kcal / 100 g

Mango 31 kcal more 60kcal / 100 g

Peach 17 kcal more 46kcal / 100 g

Kiwi 29 kcal more 58kcal / 100 g

Questions about lemon