Carbs in Cos (Romaine) Lettuce
Keto-friendlyHow many carbs are in cos (romaine) lettuce?
Cos (Romaine) Lettuce has 1.2g net carbs per 100g — 3.3g total carbs minus 2.1g fiber — plus 1.2g protein, 0.3g fat, and 17 calories. 100g (100g) works out to about 1.2g net carbs and 17 calories. That makes cos (romaine) lettuce very low in net carbs and lower than the typical vegetable, which averages about 17.9g net carbs per 100g. With this carb count, cos (romaine) lettuce fits a keto or low-carb diet (usually 20–50g net carbs per day) in normal portions. Values are per per 100 g, sourced from Manufacturer-reported values; net carbs are computed by CarbMeNot.
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Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Is cos (romaine) lettuce keto-friendly?
Yes — cos (romaine) lettuce is keto-friendly. It has 1.2g net carbs per 100g (3.3g total carbs − 2.1g fiber). A typical serving — 100g (100g) — is about 1.2g net carbs. On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other vegetables and meals.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 100g | 1.2g | 3.3g | 1.2g | 17 |
| 100 g (3.5 oz) | 1.2g | 3.3g | 1.2g | 17 |
| 1 oz (28 g) | 0.3g | 0.9g | 0.3g | 5 |
How many calories are in cos (romaine) lettuce?
Cos (Romaine) Lettuce has 17 calories per 100g. 100g (100g) has about 17 calories. That's alongside 1.2g protein, 0.3g fat, and 1.2g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 17 |
| Total carbs | 3.3g |
| Net carbs | 1.2g |
| Fiber | 2.1g |
| Sugar | 1.2g |
| Sugar alcohols | 0g |
| Protein | 1.2g |
| Fat | 0.3g |
| Sodium | 8mg |
| Potassium | 247mg |
Source: Manufacturer-reported values (vegetables). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in cos (romaine) lettuce?
- Cos (Romaine) Lettuce has 3.3g of total carbs and 1.2g of net carbs per 100 grams.
- How many net carbs are in cos (romaine) lettuce?
- Cos (Romaine) Lettuce has 1.2g of net carbs per 100 grams (total carbs 3.3g minus 2.1g fiber).
- Is cos (romaine) lettuce keto-friendly?
- Yes — cos (romaine) lettuce is keto-friendly. It has 1.2g net carbs per 100g (3.3g total carbs − 2.1g fiber). A typical serving — 100g (100g) — is about 1.2g net carbs. On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other vegetables and meals.
- How many calories are in cos (romaine) lettuce?
- Cos (Romaine) Lettuce has 17 calories per 100 grams.
- How many carbs are in 100g of cos (romaine) lettuce?
- 100g of cos (romaine) lettuce (100g) has about 1.2g net carbs, 3.3g total carbs, and 17 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.