1 Cup Powdered Sugar Calories & Carbs
Last updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 1 cup (120g), 120g; per 100 g: 99.2g net carbs, 389 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 1 cup powdered sugar?
1 Cup Powdered Sugar — 1 cup (120g), 120g — has 119g net carbs: 119g total carbs minus 0g fiber, plus 0g protein, 0.5g fat, and 467 calories. Per 100g that is 99.2g net carbs (99.2g total carbs, 0g fiber) and 389 calories. That makes 1 cup powdered sugar high in net carbs and higher than the typical snacks and sweet, which averages about 55.0g 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 100 g, sourced from Manufacturer-reported values; net carbs are computed by CarbMeNot.
Is 1 cup powdered sugar keto-friendly?
1 Cup Powdered Sugar is generally not keto-friendly. 1 cup (120g), 120g is 119g net carbs (119g total carbs − 0g fiber); per 100g that is 99.2g 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 1 cup powdered sugar?
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.
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 — 1 cup (120g), 120g — has 467 calories, with 0g protein, 0.5g fat, and 119g net carbs. Per 100g: 389 calories and 99.2g net carbs.
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 (1 cup (120g), 120g) has 119g of total carbs and 119g of net carbs. Per 100 grams: 99.2g total, 99.2g net.
- How many net carbs are in 1 cup powdered sugar?
- 1 Cup Powdered Sugar has 119g of net carbs per 1 cup (120g), 120g — 119g total carbs minus 0g fiber.
- Is 1 cup powdered sugar keto-friendly?
- 1 Cup Powdered Sugar is generally not keto-friendly. 1 cup (120g), 120g is 119g net carbs (119g total carbs − 0g fiber); per 100g that is 99.2g 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 1 cup powdered sugar?
- 1 Cup Powdered Sugar (1 cup (120g), 120g) has 467 calories; that is 389 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.