Watermelon Nutrition Facts
Complete watermelon nutrition breakdown with 30 kcal per 100g, glycemic index, and diet compatibility.
Written by Victura Nutrition TeamReviewed by Victura Editorial ReviewLast updated Jul 19, 2026
30
Calories
0.6g
Protein
7.5g
Carbs
Use caution
Is it healthy?
per 100g · per panel values
Track this food in VicturaQuick answer
A 100g serving of watermelon provides about 30 kcal. Per 100g you get about 7.55g carbs and 0.61g protein. Glycemic index is around 72.
Watermelon is a whole food with approximately 30 calories per 100g, tracked in Victura for macro-aware meal logging.
- Calories (100g serving)
- 30 kcal
- Carbs (100g)
- 7.55g
- Protein (100g)
- 0.61g
- Serving reference
- 100g · 100g serving
- Glycemic index
- 72
Serving calculator
How much did you eat or drink — Watermelon?
30
Calories
0.6g
Protein
7.5g
Carbs
0.1g
Fat
Nutrition facts
per 100g · Source: USDA FoodData Central (seeded Phase 0)
30 kcal
Calories
Vitamins
- Vitamin C: 8.1mg
- Vitamin A: 28mcg RAE
Minerals
- Potassium: 112mg
Scientific explanation
Research-backedWatermelon provides approximately 30 kcal per 100g with 0.6g protein, 7.5g carbohydrates, and 0.1g fat. Dietary fiber is 0.4g per 100g. The glycemic index is estimated at 72 (high), meaning glucose rises at a fast rate after consumption. Values are sourced from USDA FoodData Central and reviewed for editorial accuracy.
Community insights
Community insightAmong Victura meal logs, watermelon appears frequently as a portable snack and smoothie ingredient. Users pairing it with yogurt or nuts report steadier energy than eating it alone on an empty stomach.
Pros
- Watermelon is a whole food with measurable macro nutrients
Cons
- Portion size still matters for calorie goals
Best time to eat
Pair with protein and fiber for balanced meals.
Good windows
- With main meals
Consider avoiding
- Very large portions without activity
Diet compatibility
Weight loss
Use caution
At 30 kcal and 0.4g fiber per 100g, this food is energy-dense - watch portions.
Keto
Use caution
Net carbs ~7.1g per 100g - too high-carb for standard keto.
Diabetic friendly
Use caution
GI 72 with 6.2g sugar - may spike glucose - pair with protein/fat.
Frequently asked questions
People also ask
Is a watermelon healthy?
Yes — a watermelon is a whole food with measurable nutrients. Healthiness depends on overall diet, portions, and your goals. Estimated GI is 72.
Can I eat a watermelon every day?
Most people can include a watermelon daily as part of a balanced diet, as long as total calories and carbs fit their plan.
Are Watermelons good for weight loss?
At 30 kcal and 0.4g fiber per 100g, this food is energy-dense - watch portions.
How many calories are in a watermelon?
A typical medium serving of watermelon has about 30 calories, while 100g contains about 30 calories (USDA reference).
Are Watermelons good before a workout?
Watermelons can work before activity when you want easy carbs; pair a watermelon with protein if your session is long.
Are Watermelons high in sugar?
Watermelons contain about 6.2g sugar per 100g — mostly natural sugars when whole.
Is watermelon good for weight loss?
At 30 kcal and 0.4g fiber per 100g, this food is energy-dense - watch portions.
Is watermelon keto-friendly?
Net carbs ~7.1g per 100g - too high-carb for standard keto.
What is the glycemic index of watermelon?
Estimated GI is 72. Pair with protein or fat to blunt glucose response.
Is watermelon safe for people with diabetes?
GI 72 with 6.2g sugar - may spike glucose - pair with protein/fat.
How many calories does watermelon have?
Watermelon contains 30 calories (kcal) per 100g. Because it is over 91% water, it has a very low calorie density, allowing you to eat a larger portion for relatively few calories.
How we review this guide
- Written by
- Victura Nutrition Team
- Reviewed by
- Victura Editorial Review
- Reference sources
- 4
- Last updated
- Jul 19, 2026
References
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