Watermelon (100g) Calories & Carbs
Last updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 100g (100g); per 100 g: 7.2g net carbs, 30 cal. Net carbs = total carbs − fiber − sugar alcohols — do the math for any label with the free net carbs calculator.
How many carbs are in watermelon (100g)?
Watermelon (100g) — 100g (100g) — has 7.2g net carbs: 7.6g total carbs minus 0.4g fiber, plus 0.6g protein, 0.2g fat, and 30 calories. Per 100g that is 7.2g net carbs (7.6g total carbs, 0.4g fiber) and 30 calories. That makes watermelon (100g) relatively low in net carbs and lower than the typical fruit, which averages about 17.3g net carbs per 100g. At this carb count, watermelon (100g) is best limited to small portions on keto (usually 20–50g net carbs per day). Values are per 100 g, sourced from Manufacturer-reported values; net carbs are computed by CarbMeNot.
Is watermelon (100g) keto-friendly?
Yes, watermelon (100g) can fit a keto diet in moderate portions. 100g (100g) is 7.2g net carbs (7.6g total carbs − 0.4g fiber); per 100g that is 7.2g net carbs. On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other fruits and meals.
Keeping an eye on carbs in watermelon (100g)?
Watermelon (100g) runs higher in carbs, so portions matter. CarbMeNot tracks every gram from a photo, so you stay under your daily limit without the math.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 100g | 7.2g | 7.6g | 0.6g | 30 |
| 100 g (3.5 oz) | 7.2g | 7.6g | 0.6g | 30 |
| 1 oz (28 g) | 2g | 2.1g | 0.2g | 8 |
How many calories are in watermelon (100g)?
Watermelon (100g) — 100g (100g) — has 30 calories, with 0.6g protein, 0.2g fat, and 7.2g net carbs. Per 100g: 30 calories and 7.2g net carbs.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 30 |
| Total carbs | 7.6g |
| Net carbs | 7.2g |
| Fiber | 0.4g |
| Sugar | 6.2g |
| Sugar alcohols | 0g |
| Protein | 0.6g |
| Fat | 0.2g |
| Sodium | 1mg |
| Potassium | 112mg |
Source: Manufacturer-reported values (fruits). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
Log watermelon (100g) in one tap
Snap a photo and CarbMeNot's AI logs the carbs, protein, and fat automatically.
Frequently asked questions
- How many carbs are in watermelon (100g)?
- Watermelon (100g) (100g, 100g) has 7.6g of total carbs and 7.2g of net carbs. Per 100 grams: 7.6g total, 7.2g net.
- How many net carbs are in watermelon (100g)?
- Watermelon (100g) has 7.2g of net carbs per 100g (100g) — 7.6g total carbs minus 0.4g fiber.
- Is watermelon (100g) keto-friendly?
- Yes, watermelon (100g) can fit a keto diet in moderate portions. 100g (100g) is 7.2g net carbs (7.6g total carbs − 0.4g fiber); per 100g that is 7.2g net carbs. On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other fruits and meals.
- How many calories are in watermelon (100g)?
- Watermelon (100g) (100g, 100g) has 30 calories; that is 30 calories per 100 grams.
Similar foods
CarbMeNot provides general nutrition information, not medical advice. Values are estimates — verify before relying on them for any health decision. See our Medical Disclaimer.