Carbs in 2/3 Cup Granulated Sugar
How many carbs are in 2/3 cup granulated sugar?
2/3 Cup Granulated Sugar has 100g net carbs per 100g — 100g total carbs minus 0g fiber — plus 0g protein, 0g fat, and 387 calories. 2/3 cup (134g) works out to about 134g net carbs and 519 calories. That makes 2/3 cup granulated sugar high in net carbs and higher than the typical snacks and sweet, which averages about 55.7g net carbs per 100g. At this carb count, 2/3 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 Manufacturer-reported values; net carbs are computed by CarbMeNot.
Keeping an eye on carbs in 2/3 cup granulated sugar?
2/3 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 June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Is 2/3 cup granulated sugar keto-friendly?
2/3 Cup Granulated Sugar is generally not keto-friendly. It has 100g net carbs per 100g (100g total carbs − 0g fiber). A typical serving — 2/3 cup (134g) — is about 134g 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 |
|---|---|---|---|---|
| 2/3 cup (134g) | 134g | 134g | 0g | 519 |
| 100 g (3.5 oz) | 100g | 100g | 0g | 387 |
| 1 oz (28 g) | 28g | 28g | 0g | 108 |
How many calories are in 2/3 cup granulated sugar?
2/3 Cup Granulated Sugar has 387 calories per 100g. 2/3 cup (134g) has about 519 calories. That's alongside 0g protein, 0g fat, and 100g net carbs per 100g.
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: Manufacturer-reported values (other). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in 2/3 cup granulated sugar?
- 2/3 Cup Granulated Sugar has 100g of total carbs and 100g of net carbs per 100 grams.
- How many net carbs are in 2/3 cup granulated sugar?
- 2/3 Cup Granulated Sugar has 100g of net carbs per 100 grams (total carbs 100g minus 0g fiber).
- Is 2/3 cup granulated sugar keto-friendly?
- 2/3 Cup Granulated Sugar is generally not keto-friendly. It has 100g net carbs per 100g (100g total carbs − 0g fiber). A typical serving — 2/3 cup (134g) — is about 134g 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 2/3 cup granulated sugar?
- 2/3 Cup Granulated Sugar has 387 calories per 100 grams.
- How many carbs are in 2/3 cup (134g) of 2/3 cup granulated sugar?
- 2/3 cup (134g) of 2/3 cup granulated sugar (134g) has about 134g net carbs, 134g total carbs, and 519 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.