Watermelon (Low-Calorie Fruit) Calories & Carbs
Last updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 1 cup diced (152g), 152g; 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 (low-calorie fruit)?
Watermelon (Low-Calorie Fruit) — 1 cup diced (152g), 152g — has 10.9g net carbs: 11.6g total carbs minus 0.6g fiber, plus 0.9g protein, 0.2g fat, and 46 calories. Per 100g that is 7.2g net carbs (7.6g total carbs, 0.4g fiber) and 30 calories. That makes watermelon (low-calorie fruit) 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 (low-calorie fruit) 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 (low-calorie fruit) keto-friendly?
Watermelon (Low-Calorie Fruit) is borderline for keto — it works only in small portions. 1 cup diced (152g), 152g is 10.9g net carbs (11.6g total carbs − 0.6g fiber); per 100g that is 7.2g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
Keeping an eye on carbs in watermelon (low-calorie fruit)?
Watermelon (Low-Calorie Fruit) 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 |
|---|---|---|---|---|
| 1 cup diced (152g) | 10.9g | 11.6g | 0.9g | 46 |
| 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 (low-calorie fruit)?
Watermelon (Low-Calorie Fruit) — 1 cup diced (152g), 152g — has 46 calories, with 0.9g protein, 0.2g fat, and 10.9g 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 | 0.1g |
| 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 (low-calorie fruit)?
- Watermelon (Low-Calorie Fruit) (1 cup diced (152g), 152g) has 11.6g of total carbs and 10.9g of net carbs. Per 100 grams: 7.6g total, 7.2g net.
- How many net carbs are in watermelon (low-calorie fruit)?
- Watermelon (Low-Calorie Fruit) has 10.9g of net carbs per 1 cup diced (152g), 152g — 11.6g total carbs minus 0.6g fiber.
- Is watermelon (low-calorie fruit) keto-friendly?
- Watermelon (Low-Calorie Fruit) is borderline for keto — it works only in small portions. 1 cup diced (152g), 152g is 10.9g net carbs (11.6g total carbs − 0.6g fiber); per 100g that is 7.2g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
- How many calories are in watermelon (low-calorie fruit)?
- Watermelon (Low-Calorie Fruit) (1 cup diced (152g), 152g) has 46 calories; that is 30 calories per 100 grams.
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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.