McDonald's Hot Fudge Sundae Calories & Carbs
Last updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 1 sundae (179g); per 100 g: 28.5g net carbs, 184 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 mcdonald's hot fudge sundae?
McDonald's Hot Fudge Sundae — 1 sundae (179g) — has 51g net carbs: 52.1g total carbs minus 1.1g fiber, plus 7g protein, 9g fat, and 329 calories. Per 100g that is 28.5g net carbs (29.1g total carbs, 0.6g fiber) and 184 calories. That makes mcdonald's hot fudge sundae high in net carbs and about average for the typical fast-food item, which averages about 26.2g 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 100 g, sourced from Manufacturer-reported values; net carbs are computed by CarbMeNot.
Is mcdonald's hot fudge sundae keto-friendly?
McDonald's Hot Fudge Sundae is generally not keto-friendly. 1 sundae (179g) is 51g net carbs (52.1g total carbs − 1.1g fiber); per 100g that is 28.5g 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 mcdonald's hot fudge sundae?
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.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 1 sundae | 51g | 52.1g | 7g | 329 |
| 100 g (3.5 oz) | 28.5g | 29.1g | 3.9g | 184 |
| 1 oz (28 g) | 8g | 8.1g | 1.1g | 52 |
How many calories are in mcdonald's hot fudge sundae?
McDonald's Hot Fudge Sundae — 1 sundae (179g) — has 329 calories, with 7g protein, 9g fat, and 51g net carbs. Per 100g: 184 calories and 28.5g net carbs.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 184 |
| Total carbs | 29.1g |
| Net carbs | 28.5g |
| Fiber | 0.6g |
| Sugar | 24g |
| Sugar alcohols | 0g |
| Protein | 3.9g |
| Fat | 5g |
| Sodium | 89mg |
| Potassium | 168mg |
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 (1 sundae, 179g) has 52.1g of total carbs and 51g of net carbs. Per 100 grams: 29.1g total, 28.5g net.
- How many net carbs are in mcdonald's hot fudge sundae?
- McDonald's Hot Fudge Sundae has 51g of net carbs per 1 sundae (179g) — 52.1g total carbs minus 1.1g fiber.
- Is mcdonald's hot fudge sundae keto-friendly?
- McDonald's Hot Fudge Sundae is generally not keto-friendly. 1 sundae (179g) is 51g net carbs (52.1g total carbs − 1.1g fiber); per 100g that is 28.5g 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 (1 sundae, 179g) has 329 calories; that is 184 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.