Watermelon calories
At 30 kcal per 100 g, watermelon gets 90% of its energy from carbs, 7% from protein and 3% from fat. One 152 g serving is about 46 kcal.
A serving covers about 2% of the 2,000 kcal reference day used on US nutrition labels.
A real serving: 41 to 50 kcal
Nutrition facts
| Nutrient | Per 100 g | Per serving (152 g) |
|---|---|---|
| kcal | 30 | 46 |
| Protein, g | 0.6 | 0.9 |
| Fat, g | 0.1 | 0.2 |
| Carbs, g | 7.5 | 11.4 |
| Fiber, g | 0.4 | 0.6 |
Calories by portion
| Portions | Most likely | Range, kcal | Steps to burn |
|---|---|---|---|
| ½ · 76 g | 23 kcal | 21-25 | 710 |
| 1 · 152 g | 46 kcal | 41-50 | 1,400 |
| 1½ · 228 g | 68 kcal | 62-75 | 2,100 |
| 2 · 304 g | 91 kcal | 82-100 | 2,800 |
The same portion buttons as in the Kalorea app: ½, 1, 1½ and 2 servings.
How long to burn one serving
About 1,400 steps, or 11 minutes of brisk walking for an average adult.
How we count: an adult of 75 kg and 175 cm walking at 5.6 km/h burns (4.3 − 1) × 75 = 247.5 kcal an hour above resting. Steps are distance divided by a stride of 0.415 × height. That's about 31 steps per kcal. The Kalorea app uses your own height and weight.
Fruit varies mostly by size. A small banana and a large one can differ by 60 kcal, so something for scale in the frame helps.
Compared with similar foods
| Food | kcal / 100 g | Serving | Protein / 100 g |
|---|---|---|---|
| Lemon | 29 | 17 kcal / 58 g | 1.1 g |
| Lime | 30 | 20 kcal / 67 g | 0.7 g |
| Watermelon | 30 | 46 kcal / 152 g | 0.6 g |
| Grapefruit | 32 | 41 kcal / 128 g | 0.6 g |
| Cantaloupe | 34 | 54 kcal / 160 g | 0.8 g |
| Honeydew melon | 36 | 61 kcal / 170 g | 0.5 g |
| Peach | 39 | 58 kcal / 150 g | 0.9 g |
| Applesauce | 42 | 51 kcal / 122 g | 0.2 g |
| Papaya | 43 | 62 kcal / 145 g | 0.5 g |
Lightest in this group per 100 g: Lemon.
Where the numbers come from
Values from USDA FoodData Central, a public domain (CC0) database by the US Department of Agriculture: FDC 167765 (Watermelon, raw).
The ±10% range covers natural variation between samples: size, variety, ripeness or fat content, and how it was prepared.
Questions
How many calories in watermelon?
Watermelon has about 30 kcal per 100 g. A typical 152 g serving is about 46 kcal, and realistically anywhere from 41 to 50 kcal depending on the recipe and portion.
How much protein is in watermelon?
0.6 g of protein per 100 g, or about 0.9 g in a 152 g serving.
Your plate isn't a lab sample
Snap your own watermelon and Kalorea estimates what's actually on your plate, with a range and macros.