Carbs in Sourdough Bread
How many carbs are in sourdough bread?
Sourdough Bread has 42.3g net carbs per 100g — 44.1g total carbs minus 1.8g fiber — plus 7g protein, 0g fat, and 212 calories. 1 slice (48g) works out to about 20.3g net carbs and 102 calories. That makes sourdough bread high in net carbs and about average for the typical breads and grain, which averages about 45.2g net carbs per 100g. At this carb count, sourdough bread 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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Sourdough Bread 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 sourdough bread keto-friendly?
Sourdough Bread is generally not keto-friendly. It has 42.3g net carbs per 100g (44.1g total carbs − 1.8g fiber). A typical serving — 1 slice (48g) — is about 20.3g 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 slice | 20.3g | 21.2g | 3.4g | 102 |
| 100 g (3.5 oz) | 42.3g | 44.1g | 7g | 212 |
| 1 oz (28 g) | 11.8g | 12.3g | 2g | 59 |
How many calories are in sourdough bread?
Sourdough Bread has 212 calories per 100g. 1 slice (48g) has about 102 calories. That's alongside 7g protein, 0g fat, and 42.3g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 212 |
| Total carbs | 44.1g |
| Net carbs | 42.3g |
| Fiber | 1.8g |
| Sugar | 0g |
| Sugar alcohols | 0g |
| Protein | 7g |
| Fat | 0g |
| Sodium | 23mg |
| Potassium | 0mg |
Source: Open Food Facts (Izzio). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in sourdough bread?
- Sourdough Bread has 44.1g of total carbs and 42.3g of net carbs per 100 grams.
- How many net carbs are in sourdough bread?
- Sourdough Bread has 42.3g of net carbs per 100 grams (total carbs 44.1g minus 1.8g fiber).
- Is sourdough bread keto-friendly?
- Sourdough Bread is generally not keto-friendly. It has 42.3g net carbs per 100g (44.1g total carbs − 1.8g fiber). A typical serving — 1 slice (48g) — is about 20.3g 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 sourdough bread?
- Sourdough Bread has 212 calories per 100 grams.
- How many carbs are in 1 slice of sourdough bread?
- 1 slice of sourdough bread (48g) has about 20.3g net carbs, 21.2g total carbs, and 102 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.