Carbs in McDonald's Filet-O-Fish
How many carbs are in mcdonald's filet-o-fish?
McDonald's Filet-O-Fish has 26.4g net carbs per 100g — 27.9g total carbs minus 1.5g fiber — plus 12.5g protein, 14g fat, and 287 calories. 1 sandwich (136g) works out to about 35.9g net carbs and 390 calories. That makes mcdonald's filet-o-fish high in net carbs and about average for the typical fast-food item, which averages about 27.1g 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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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 | 35.9g | 37.9g | 17g | 390 |
| 100 g (3.5 oz) | 26.4g | 27.9g | 12.5g | 287 |
| 1 oz (28 g) | 7.4g | 7.8g | 3.5g | 80 |
How many calories are in mcdonald's filet-o-fish?
McDonald's Filet-O-Fish has 287 calories per 100g. 1 sandwich (136g) has about 390 calories. That's alongside 12.5g protein, 14g fat, and 26.4g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 287 |
| Total carbs | 27.9g |
| Net carbs | 26.4g |
| Fiber | 1.5g |
| Sugar | 3.7g |
| Sugar alcohols | 0g |
| Protein | 12.5g |
| Fat | 14g |
| Sodium | 412mg |
| Potassium | 0mg |
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 27.9g of total carbs and 26.4g of net carbs per 100 grams.
- How many net carbs are in mcdonald's filet-o-fish?
- McDonald's Filet-O-Fish has 26.4g of net carbs per 100 grams (total carbs 27.9g minus 1.5g fiber).
- Is mcdonald's filet-o-fish keto-friendly?
- McDonald's Filet-O-Fish has 26.4g 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 287 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 (136g) has about 35.9g net carbs, 37.9g total carbs, and 390 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.