Carbs in Guinness Beer
How many carbs are in guinness beer?
Guinness Beer has 35g net carbs per 100g — 35g total carbs minus 0g fiber — plus 1.6g protein, 0.1g fat, and 153 calories. 1 can (12 fl oz) works out to about 124.3g net carbs and 543 calories. That makes guinness beer high in net carbs and higher than the typical drink, which averages about 21.1g net carbs per 100g. At this carb count, guinness beer 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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Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Is guinness beer keto-friendly?
Guinness Beer is generally not keto-friendly. It has 35g net carbs per 100g (35g total carbs − 0g fiber). A typical serving — 1 can (12 fl oz) — is about 124.3g net carbs. 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 |
|---|---|---|---|---|
| 1 can (12 fl oz) | 124.3g | 124.3g | 5.7g | 543 |
| 100 g (3.5 oz) | 35g | 35g | 1.6g | 153 |
| 1 oz (28 g) | 9.8g | 9.8g | 0.4g | 43 |
How many calories are in guinness beer?
Guinness Beer has 153 calories per 100g. 1 can (12 fl oz) has about 543 calories. That's alongside 1.6g protein, 0.1g fat, and 35g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 153 |
| Total carbs | 35g |
| Net carbs | 35g |
| Fiber | 0g |
| Sugar | 29.4g |
| Sugar alcohols | 0g |
| Protein | 1.6g |
| Fat | 0.1g |
| Sodium | 444mg |
| Potassium | 0mg |
Source: Open Food Facts (Guinness). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in guinness beer?
- Guinness Beer has 35g of total carbs and 35g of net carbs per 100 grams.
- How many net carbs are in guinness beer?
- Guinness Beer has 35g of net carbs per 100 grams (total carbs 35g minus 0g fiber).
- Is guinness beer keto-friendly?
- Guinness Beer is generally not keto-friendly. It has 35g net carbs per 100g (35g total carbs − 0g fiber). A typical serving — 1 can (12 fl oz) — is about 124.3g net carbs. 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 guinness beer?
- Guinness Beer has 153 calories per 100 grams.
- How many carbs are in 1 can (12 fl oz) of guinness beer?
- 1 can (12 fl oz) of guinness beer (355g) has about 124.3g net carbs, 124.3g total carbs, and 543 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.