Carbs in McDonald's Hot Fudge Sundae
How many carbs are in mcdonald's hot fudge sundae?
McDonald's Hot Fudge Sundae has 28.5g net carbs per 100g — 29g total carbs minus 0.5g fiber — plus 3.8g protein, 5.5g fat, and 180 calories. 1 sundae (183g) works out to about 52.2g net carbs and 329 calories. That makes mcdonald's hot fudge sundae high in net carbs and about average for the typical fast-food item, which averages about 26.8g net carbs per 100g. At this carb count, mcdonald's hot fudge sundae 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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McDonald's Hot Fudge Sundae 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 mcdonald's hot fudge sundae keto-friendly?
McDonald's Hot Fudge Sundae is generally not keto-friendly. It has 28.5g net carbs per 100g (29g total carbs − 0.5g fiber). A typical serving — 1 sundae (183g) — is about 52.2g 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.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 1 sundae | 52.2g | 53.1g | 7g | 329 |
| 100 g (3.5 oz) | 28.5g | 29g | 3.8g | 180 |
| 1 oz (28 g) | 8g | 8.1g | 1.1g | 50 |
How many calories are in mcdonald's hot fudge sundae?
McDonald's Hot Fudge Sundae has 180 calories per 100g. 1 sundae (183g) has about 329 calories. That's alongside 3.8g protein, 5.5g fat, and 28.5g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 180 |
| Total carbs | 29g |
| Net carbs | 28.5g |
| Fiber | 0.5g |
| Sugar | 24g |
| Sugar alcohols | 0g |
| Protein | 3.8g |
| Fat | 5.5g |
| Sodium | 98mg |
| Potassium | 0mg |
Source: Manufacturer-reported values (snacks-sweets). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in mcdonald's hot fudge sundae?
- McDonald's Hot Fudge Sundae has 29g of total carbs and 28.5g of net carbs per 100 grams.
- How many net carbs are in mcdonald's hot fudge sundae?
- McDonald's Hot Fudge Sundae has 28.5g of net carbs per 100 grams (total carbs 29g minus 0.5g fiber).
- Is mcdonald's hot fudge sundae keto-friendly?
- McDonald's Hot Fudge Sundae is generally not keto-friendly. It has 28.5g net carbs per 100g (29g total carbs − 0.5g fiber). A typical serving — 1 sundae (183g) — is about 52.2g 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 mcdonald's hot fudge sundae?
- McDonald's Hot Fudge Sundae has 180 calories per 100 grams.
- How many carbs are in 1 sundae?
- 1 sundae (183g) has about 52.2g net carbs, 53.1g total carbs, and 329 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.