Carbs in ½ Cup Granulated Sugar
How many carbs are in ½ cup granulated sugar?
½ Cup Granulated Sugar — ½ cup (100g) — has 100g net carbs: 100g total carbs minus 0g fiber, plus 0g protein, 0g fat, and 387 calories. Per 100g that is 100g net carbs (100g total carbs, 0g fiber) and 387 calories. That makes ½ cup granulated sugar high in net carbs and higher than the typical snacks and sweet, which averages about 55.2g net carbs per 100g. At this carb count, ½ cup granulated sugar is best limited to small portions on keto (usually 20–50g net carbs per day). Values are per per 100 g, sourced from USDA FoodData Central; net carbs are computed by CarbMeNot.
Keeping an eye on carbs in ½ cup granulated sugar?
½ Cup Granulated Sugar 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 September 8, 2026 · Compiled by the CarbMeNot Team
Values per ½ cup (100g); per 100 g: 100g net carbs, 387 cal. Net carbs = total carbs − fiber − sugar alcohols — do the math for any label with the free net carbs calculator.
Is ½ cup granulated sugar keto-friendly?
½ Cup Granulated Sugar is generally not keto-friendly. ½ cup (100g) is 100g net carbs (100g total carbs − 0g fiber); per 100g that is 100g 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.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| ½ cup | 100g | 100g | 0g | 387 |
| 100 g (3.5 oz) | 100g | 100g | 0g | 387 |
| 1 oz (28 g) | 28g | 28g | 0g | 108 |
How many calories are in ½ cup granulated sugar?
½ Cup Granulated Sugar — ½ cup (100g) — has 387 calories, with 0g protein, 0g fat, and 100g net carbs. Per 100g: 387 calories and 100g net carbs.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 387 |
| Total carbs | 100g |
| Net carbs | 100g |
| Fiber | 0g |
| Sugar | 100g |
| Sugar alcohols | 0g |
| Protein | 0g |
| Fat | 0g |
| Sodium | 0mg |
| Potassium | 2mg |
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 granulated sugar?
- ½ Cup Granulated Sugar (½ cup, 100g) has 100g of total carbs and 100g of net carbs. Per 100 grams: 100g total, 100g net.
- How many net carbs are in ½ cup granulated sugar?
- ½ Cup Granulated Sugar has 100g of net carbs per ½ cup (100g) — 100g total carbs minus 0g fiber.
- Is ½ cup granulated sugar keto-friendly?
- ½ Cup Granulated Sugar is generally not keto-friendly. ½ cup (100g) is 100g net carbs (100g total carbs − 0g fiber); per 100g that is 100g 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 ½ cup granulated sugar?
- ½ Cup Granulated Sugar (½ cup, 100g) has 387 calories; that is 387 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.