Watermelon
30 kcal per 100g
Watermelon has 30 kcal per 100 g, and 1 cup diced (152 g) comes to about 46 kcal, with 0.9 g protein, 12 g carbs and 0.3 g fat.
Kairo logs Watermelon from a photo: the app estimates the portion on the plate and fills in calories and macros from reference data, no typing needed.
Your portion
Type the grams or the calorie budget you have left.
- 0.6 g
- Protein
- 7.6 g
- Carbs
- 0.2 g
- Fat
100 g ≈ 2 % of a 2,000 kcal reference intake. Work out your own daily need
Nutrition Facts
Serving size: 100g
Health Info
Watermelon is 92% water, making it ideal for hydration on hot days. It is a leading dietary source of lycopene (an antioxidant linked to heart health and lower oxidative stress) and provides citrulline, an amino acid that supports blood-flow regulation.
Macros per 100g
Values per 100 g are based on recognised nutrition reference data. Last reviewed: May 2026. View sources
Track Watermelon in Kairo
Just photograph it. Kairo's AI reads the portion and the nutrition. Three seconds later the calories and macros are in your log, no typing.
Get Kairo on the App StoreFrequently Asked Questions
- How many calories are in Watermelon?
- Watermelon has 30 kcal per 100 g. A typical 152 g serving contains about 46 kcal.
- How much protein is in Watermelon?
- Watermelon provides 0.6 g of protein per 100 g.
- How many carbs are in Watermelon?
- Watermelon contains 7.6 g of carbohydrates per 100 g, of which 6.2 g is sugar.
- How much fat is in Watermelon?
- Watermelon contains 0.2 g of fat per 100 g. It also provides 0.4 g of fiber per 100 g.
- Is Watermelon good for weight loss?
- With only 30 kcal per 100 g, Watermelon is low in calories and fits easily into a weight-loss diet.
- Can I log Watermelon in Kairo from a photo?
- Yes, photograph the plate and Kairo estimates the portion of Watermelon, then logs calories and macros from reference data. If the portion looks off, you can adjust the grams and the numbers update.