Carbs in ½ Cup Blackberries
Keto-friendlyHow many carbs are in ½ cup blackberries?
½ Cup Blackberries — ½ cup (72g) — has 3.1g net carbs: 6.9g total carbs minus 3.8g fiber, plus 1g protein, 0.4g fat, and 31 calories. Per 100g that is 4.3g net carbs (9.6g total carbs, 5.3g fiber) and 43 calories. That makes ½ cup blackberries relatively low in net carbs and lower than the typical fruit, which averages about 17.3g net carbs per 100g. With this carb count, ½ cup blackberries fits a keto or low-carb diet (usually 20–50g net carbs per day) in normal portions. Values are per per 100 g, sourced from USDA FoodData Central; net carbs are computed by CarbMeNot.
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Last updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per ½ cup (72g); per 100 g: 4.3g net carbs, 43 cal. Net carbs = total carbs − fiber − sugar alcohols — do the math for any label with the free net carbs calculator.
Is ½ cup blackberries keto-friendly?
Yes, ½ cup blackberries can fit a keto diet in moderate portions. ½ cup (72g) is 3.1g net carbs (6.9g total carbs − 3.8g fiber); per 100g that is 4.3g 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 |
|---|---|---|---|---|
| ½ cup | 3.1g | 6.9g | 1g | 31 |
| 100 g (3.5 oz) | 4.3g | 9.6g | 1.4g | 43 |
| 1 oz (28 g) | 1.2g | 2.7g | 0.4g | 12 |
How many calories are in ½ cup blackberries?
½ Cup Blackberries — ½ cup (72g) — has 31 calories, with 1g protein, 0.4g fat, and 3.1g net carbs. Per 100g: 43 calories and 4.3g net carbs.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 43 |
| Total carbs | 9.6g |
| Net carbs | 4.3g |
| Fiber | 5.3g |
| Sugar | 4.9g |
| Sugar alcohols | 0g |
| Protein | 1.4g |
| Fat | 0.5g |
| Sodium | 1mg |
| Potassium | 162mg |
Source: USDA FoodData Central (SR Legacy). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in ½ cup blackberries?
- ½ Cup Blackberries (½ cup, 72g) has 6.9g of total carbs and 3.1g of net carbs. Per 100 grams: 9.6g total, 4.3g net.
- How many net carbs are in ½ cup blackberries?
- ½ Cup Blackberries has 3.1g of net carbs per ½ cup (72g) — 6.9g total carbs minus 3.8g fiber.
- Is ½ cup blackberries keto-friendly?
- Yes, ½ cup blackberries can fit a keto diet in moderate portions. ½ cup (72g) is 3.1g net carbs (6.9g total carbs − 3.8g fiber); per 100g that is 4.3g 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 ½ cup blackberries?
- ½ Cup Blackberries (½ cup, 72g) has 31 calories; that is 43 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.