Carbs in Fish
How many carbs are in fish?
Fish has 20.1g net carbs per 100g — 21g total carbs minus 0.9g fiber — plus 12g protein, 9.4g fat, and 218 calories. At this carb count, fish 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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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.
Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Is fish keto-friendly?
Fish is generally not keto-friendly. It has 20.1g net carbs per 100g (21g total carbs − 0.9g 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) | 20.1g | 21g | 12g | 218 |
| 1 oz (28 g) | 5.6g | 5.9g | 3.4g | 61 |
How many calories are in fish?
Fish has 218 calories per 100g. That's alongside 12g protein, 9.4g fat, and 20.1g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 218 |
| Total carbs | 21g |
| Net carbs | 20.1g |
| Fiber | 0.9g |
| Sugar | 1g |
| Sugar alcohols | 0g |
| Protein | 12g |
| Fat | 9.4g |
| Sodium | 352mg |
| Potassium | 0mg |
Source: Open Food Facts (Birds Eye). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in fish?
- Fish has 21g of total carbs and 20.1g of net carbs per 100 grams.
- How many net carbs are in fish?
- Fish has 20.1g of net carbs per 100 grams (total carbs 21g minus 0.9g fiber).
- Is fish keto-friendly?
- Fish is generally not keto-friendly. It has 20.1g net carbs per 100g (21g total carbs − 0.9g 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 fish?
- Fish has 218 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.