Cos (Romaine) Lettuce Calories & Carbs
Keto-friendlyLast updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 100g (100g); per 100 g: 1.2g net carbs, 17 cal. Net carbs = total carbs − fiber − sugar alcohols — do the math for any label with the free net carbs calculator.
How many carbs are in cos (romaine) lettuce?
Cos (Romaine) Lettuce — 100g (100g) — has 1.2g net carbs: 3.3g total carbs minus 2.1g fiber, plus 1.2g protein, 0.3g fat, and 17 calories. Per 100g that is 1.2g net carbs (3.3g total carbs, 2.1g fiber) 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 100 g, sourced from Manufacturer-reported values; net carbs are computed by CarbMeNot.
Is cos (romaine) lettuce keto-friendly?
Yes — cos (romaine) lettuce is keto-friendly. 100g (100g) is 1.2g net carbs (3.3g total carbs − 2.1g fiber); per 100g that is 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.
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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 — 100g (100g) — has 17 calories, with 1.2g protein, 0.3g fat, and 1.2g net carbs. Per 100g: 17 calories and 1.2g net carbs.
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 (100g, 100g) has 3.3g of total carbs and 1.2g of net carbs. Per 100 grams: 3.3g total, 1.2g net.
- How many net carbs are in cos (romaine) lettuce?
- Cos (Romaine) Lettuce has 1.2g of net carbs per 100g (100g) — 3.3g total carbs minus 2.1g fiber.
- Is cos (romaine) lettuce keto-friendly?
- Yes — cos (romaine) lettuce is keto-friendly. 100g (100g) is 1.2g net carbs (3.3g total carbs − 2.1g fiber); per 100g that is 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 (100g, 100g) has 17 calories; that is 17 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.