There are about 30 calories in 100 grams of watermelon.
The Ministry of Health's table lists 3 entries for watermelon, from 16 to 102 calories per 100 grams. The number here is for Watermelon, raw, the entry that stands for the food on this page.
How many calories are in a portion of watermelon?
A weight in grams, or one of the food's own units, works out the calories and nutrients of that portion.
- Calories
- 30
- Protein
- 0.6 g
- Fat
- 0.2 g
- Carbohydrates
- 7.2 g
- Sodium
- 1 mg
Watermelon comes in these common portions, with the calories of each.
| Portion | Weight | Calories | Protein | Fat | Carbohydrates |
|---|---|---|---|---|---|
| cup | 186 g | 56 | 1.1 | 0.37 | 13.4 |
| medium slice | 201 g | 60 | 1.2 | 0.4 | 14.5 |
| thick slice | 250 g | 75 | 1.5 | 0.5 | 18 |
100 grams of watermelon contain 0.6 grams of protein, 0.2 grams of fat and 7.2 grams of carbohydrates.
- Protein0.6 g
- Fat0.2 g
- Saturated fat0.02 g
- Carbohydrates7.2 g
- Sugars6.2 g
- Dietary fibre0.4 g
- Sodium1 mg
- Cholesterol0 mg
These vitamins and minerals are in 100 grams of watermelon, as the Ministry lists them.
- Calcium
- 7 mg
- Iron
- 0.24 mg
- Potassium
- 112 mg
- Magnesium
- 10 mg
- Zinc
- 0.1 mg
- Vitamin C
- 8.1 mg
- Vitamin A
- 28 mcg
- Folate
- 3 mcg
The Ministry of Health lists 3 entries for watermelon.
The numbers are per 100 grams. Brands, ways of cooking and sizes each have a row of their own.
| Entry | Calories | Protein | Fat | Carbohydrates |
|---|---|---|---|---|
| Watermelon, rawThe entry used above | 30 | 0.6 | 0.2 | 7.2 |
| Watermelon, preserved in sugar | 102 | 1.1 | 0.1 | 25.8 |
| Watermelon, with skin and pips | 16 | 0.3 | 0.1 | 3.9 |
These foods are close to watermelon in calories.
These are the questions people ask about the calories in watermelon.
How many calories are in watermelon?
100 grams of watermelon have about 30 calories. The Ministry of Health's table lists 3 entries for it, from 16 to 102 calories per 100 grams.
How many calories are in 50, 100 and 200 grams of watermelon?
50 grams have 15 calories, 100 grams have 30 and 200 grams have 60.
How much protein, fat and carbohydrates are in watermelon?
In 100 grams there are 0.6 g of protein, 0.2 g of fat and 7.2 g of carbohydrates, of which 6.2 g are sugars.
How many calories are in one medium slice of watermelon?
The Ministry's table gives 201 grams for one medium slice of watermelon, which is 60 calories.
The foods, their nutrients and their unit weights are the national nutrition table of the Ministry of Health, read on 5 November 2026. The figures are averages per 100 grams of the food as the table lists it.