Carbs in 1 Cup Powdered Sugar
How many carbs are in 1 cup powdered sugar?
1 Cup Powdered Sugar has 99.2g net carbs per 100g — 99.2g total carbs minus 0g fiber — plus 0g protein, 0.4g fat, and 389 calories. 1 cup (120g) works out to about 119g net carbs and 467 calories. That makes 1 cup powdered 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, 1 cup powdered 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.
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1 Cup Powdered 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 1 cup powdered sugar keto-friendly?
1 Cup Powdered Sugar is generally not keto-friendly. It has 99.2g net carbs per 100g (99.2g total carbs − 0g fiber). A typical serving — 1 cup (120g) — is about 119g 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 |
|---|---|---|---|---|
| 1 cup (120g) | 119g | 119g | 0g | 467 |
| 100 g (3.5 oz) | 99.2g | 99.2g | 0g | 389 |
| 1 oz (28 g) | 27.8g | 27.8g | 0g | 109 |
How many calories are in 1 cup powdered sugar?
1 Cup Powdered Sugar has 389 calories per 100g. 1 cup (120g) has about 467 calories. That's alongside 0g protein, 0.4g fat, and 99.2g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 389 |
| Total carbs | 99.2g |
| Net carbs | 99.2g |
| Fiber | 0g |
| Sugar | 91.7g |
| Sugar alcohols | 0g |
| Protein | 0g |
| Fat | 0.4g |
| 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 1 cup powdered sugar?
- 1 Cup Powdered Sugar has 99.2g of total carbs and 99.2g of net carbs per 100 grams.
- How many net carbs are in 1 cup powdered sugar?
- 1 Cup Powdered Sugar has 99.2g of net carbs per 100 grams (total carbs 99.2g minus 0g fiber).
- Is 1 cup powdered sugar keto-friendly?
- 1 Cup Powdered Sugar is generally not keto-friendly. It has 99.2g net carbs per 100g (99.2g total carbs − 0g fiber). A typical serving — 1 cup (120g) — is about 119g 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 1 cup powdered sugar?
- 1 Cup Powdered Sugar has 389 calories per 100 grams.
- How many carbs are in 1 cup (120g) of 1 cup powdered sugar?
- 1 cup (120g) of 1 cup powdered sugar (120g) has about 119g net carbs, 119g total carbs, and 467 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.