Carbs in Mcdonalds Fries
How many carbs are in mcdonalds fries?
Mcdonalds Fries has 38.4g net carbs per 100g — 42g total carbs minus 3.6g fiber — plus 3.3g protein, 17g fat, and 337 calories. That makes mcdonalds fries high in net carbs and higher than the typical fast-food item, which averages about 26.5g net carbs per 100g. At this carb count, mcdonalds fries is best limited to small portions on keto (usually 20–50g net carbs per day). Values are per per 100 g, sourced from Open Food Facts; net carbs are computed by CarbMeNot.
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Mcdonalds Fries 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 mcdonalds fries keto-friendly?
Mcdonalds Fries is generally not keto-friendly. It has 38.4g net carbs per 100g (42g total carbs − 3.6g fiber). 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 |
|---|---|---|---|---|
| 100 g (3.5 oz) | 38.4g | 42g | 3.3g | 337 |
| 1 oz (28 g) | 10.8g | 11.8g | 0.9g | 94 |
How many calories are in mcdonalds fries?
Mcdonalds Fries has 337 calories per 100g. That's alongside 3.3g protein, 17g fat, and 38.4g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 337 |
| Total carbs | 42g |
| Net carbs | 38.4g |
| Fiber | 3.6g |
| Sugar | 0.6g |
| Sugar alcohols | 0g |
| Protein | 3.3g |
| Fat | 17g |
| Sodium | 248mg |
| Potassium | 0mg |
Source: Open Food Facts (McDonald’s). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in mcdonalds fries?
- Mcdonalds Fries has 42g of total carbs and 38.4g of net carbs per 100 grams.
- How many net carbs are in mcdonalds fries?
- Mcdonalds Fries has 38.4g of net carbs per 100 grams (total carbs 42g minus 3.6g fiber).
- Is mcdonalds fries keto-friendly?
- Mcdonalds Fries is generally not keto-friendly. It has 38.4g net carbs per 100g (42g total carbs − 3.6g fiber). 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 mcdonalds fries?
- Mcdonalds Fries has 337 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.