Carbs in McDonald's Filet-O-Fish
How many carbs are in mcdonald's filet-o-fish?
McDonald's Filet-O-Fish has 26.8g net carbs per 100g — 27.5g total carbs minus 0.7g fiber — plus 10.6g protein, 13.4g fat, and 275 calories. 1 sandwich (142g) works out to about 38.1g net carbs and 391 calories. That makes mcdonald's filet-o-fish high in net carbs and about average for the typical fast-food item, which averages about 27.6g net carbs per 100g. At this carb count, mcdonald's filet-o-fish 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 Filet-O-Fish runs higher in carbs, so portions matter. CarbMeNot tracks every gram from a photo, so you stay under your daily limit without the math.
Free · no signup · ★ 4.7Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 1 sandwich | 38.1g | 39.1g | 15.1g | 391 |
| 100 g (3.5 oz) | 26.8g | 27.5g | 10.6g | 275 |
| 1 oz (28 g) | 7.5g | 7.7g | 3g | 77 |
How many calories are in mcdonald's filet-o-fish?
McDonald's Filet-O-Fish has 275 calories per 100g. 1 sandwich (142g) has about 391 calories. That's alongside 10.6g protein, 13.4g fat, and 26.8g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 275 |
| Total carbs | 27.5g |
| Net carbs | 26.8g |
| Fiber | 0.7g |
| Sugar | 3.5g |
| Sugar alcohols | 0g |
| Protein | 10.6g |
| Fat | 13.4g |
| Sodium | 416mg |
| Potassium | 141mg |
Source: Manufacturer-reported values (fast-food). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in mcdonald's filet-o-fish?
- McDonald's Filet-O-Fish has 27.5g of total carbs and 26.8g of net carbs per 100 grams.
- How many net carbs are in mcdonald's filet-o-fish?
- McDonald's Filet-O-Fish has 26.8g of net carbs per 100 grams (total carbs 27.5g minus 0.7g fiber).
- Is mcdonald's filet-o-fish keto-friendly?
- McDonald's Filet-O-Fish has 26.8g net carbs per 100g, which is high for keto. Enjoy it in small portions or save it for higher-carb days.
- How many calories are in mcdonald's filet-o-fish?
- McDonald's Filet-O-Fish has 275 calories per 100 grams.
- How many carbs are in 1 sandwich of mcdonald's filet-o-fish?
- 1 sandwich of mcdonald's filet-o-fish (142g) has about 38.1g net carbs, 39.1g total carbs, and 391 calories.
