Guinness Beer Calories & Carbs
Last updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 1 can (12 fl oz), 355g; per 100 g: 35g net carbs, 153 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 guinness beer?
Guinness Beer — 1 can (12 fl oz), 355g — has 124.3g net carbs: 124.3g total carbs minus 0g fiber, plus 5.7g protein, 0.4g fat, and 543 calories. Per 100g that is 35g net carbs (35g total carbs, 0g fiber) and 153 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 100 g, sourced from Open Food Facts; net carbs are computed by CarbMeNot.
Is guinness beer keto-friendly?
Guinness Beer is generally not keto-friendly. 1 can (12 fl oz), 355g is 124.3g net carbs (124.3g total carbs − 0g fiber); per 100g that is 35g 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.
Keeping an eye on carbs in guinness beer?
Guinness Beer runs higher in carbs, so portions matter. CarbMeNot tracks every gram from a photo, so you stay under your daily limit without the math.
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 — 1 can (12 fl oz), 355g — has 543 calories, with 5.7g protein, 0.4g fat, and 124.3g net carbs. Per 100g: 153 calories and 35g net carbs.
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 (1 can (12 fl oz), 355g) has 124.3g of total carbs and 124.3g of net carbs. Per 100 grams: 35g total, 35g net.
- How many net carbs are in guinness beer?
- Guinness Beer has 124.3g of net carbs per 1 can (12 fl oz), 355g — 124.3g total carbs minus 0g fiber.
- Is guinness beer keto-friendly?
- Guinness Beer is generally not keto-friendly. 1 can (12 fl oz), 355g is 124.3g net carbs (124.3g total carbs − 0g fiber); per 100g that is 35g 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 (1 can (12 fl oz), 355g) has 543 calories; that is 153 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.