Carbs in Watermelon (100g)
How many carbs are in watermelon (100g)?
Watermelon (100g) has 7.2g net carbs per 100g — 7.6g total carbs minus 0.4g fiber — plus 0.6g protein, 0.2g fat, and 30 calories. 100g (100g) works out to about 7.2g net carbs 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 per 100 g, sourced from Manufacturer-reported values; net carbs are computed by CarbMeNot.
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.
Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Is watermelon (100g) keto-friendly?
Yes, watermelon (100g) can fit a keto diet in moderate portions. It has 7.2g net carbs per 100g (7.6g total carbs − 0.4g fiber). A typical serving — 100g (100g) — is about 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.
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) has 30 calories per 100g. 100g (100g) has about 30 calories. That's alongside 0.6g protein, 0.2g fat, and 7.2g net carbs per 100g.
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.
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Frequently asked questions
- How many carbs are in watermelon (100g)?
- Watermelon (100g) has 7.6g of total carbs and 7.2g of net carbs per 100 grams.
- How many net carbs are in watermelon (100g)?
- Watermelon (100g) has 7.2g of net carbs per 100 grams (total carbs 7.6g minus 0.4g fiber).
- Is watermelon (100g) keto-friendly?
- Yes, watermelon (100g) can fit a keto diet in moderate portions. It has 7.2g net carbs per 100g (7.6g total carbs − 0.4g fiber). A typical serving — 100g (100g) — is about 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) has 30 calories per 100 grams.
- How many carbs are in 100g of watermelon (100g)?
- 100g of watermelon (100g) (100g) has about 7.2g net carbs, 7.6g total carbs, and 30 calories.
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CarbMeNot provides general nutrition information, not medical advice. Values are estimates — verify before relying on them for any health decision. See our Medical Disclaimer.