Grains and snacks
Sourdough bread calories and nutrition
One regular slice of sourdough bread (31 g) has 84 calories, with 3.3 g of protein, 16 g of carbs and 0.8 g of fat. That is 272 calories per 100 g.
Plain sourdough bread, not toasted. Data: USDA FoodData Central, “Bread, sour dough”. Plain untoasted bread without butter. Artisan recipes and slice thickness vary; this is a sourdough-specific survey reference.
Serving size
1 regular slice · 31 g
84 calories
- Protein
- 3.3 g16% of calories · 7% DV
- Carbs
- 16 g76% of calories · 6% DV
- Fat
- 0.8 g8% of calories · 1% DV
- Fiber
- 0.7 g
- Sugars
- 1.4 g
- Saturated fat
- 0.2 g
- Sodium
- 187 mg
Sourdough bread nutrition facts
The stated USDA serving (31 g) has 84 calories, 3.3 g protein, 16 g carbs and 0.8 g fat. Plain sourdough bread, not toasted. Sources ↓
Calories in sourdough bread by serving
| Serving | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 1 regular slice31 g | 84 | 3.3 g | 16 g | 0.8 g |
| 1 thin slice24 g | 65 | 2.6 g | 12 g | 0.6 g |
| 1 thick slice43 g | 117 | 4.6 g | 22 g | 1.0 g |
| 100 g100 g | 272 | 11 g | 52 g | 2.4 g |
Serving weights are USDA’s household measures for this food.
Sourdough bread nutrition facts
Per 100 g, 272 calories: 16% from protein, 76% from carbs and 8% from fat.
| Nutrient | Per 100 g | Per serving1 regular slice · 31 g | % Daily Value |
|---|---|---|---|
| Calories | 272 | 84 | – |
| Total fat | 2.4 g | 0.8 g | 1% |
| Saturated fat | 0.5 g | 0.2 g | 1% |
| Cholesterol | 0 mg | 0 mg | 0% |
| Sodium | 602 mg | 187 mg | 8% |
| Total carbohydrate | 52 g | 16 g | 6% |
| Dietary fiber | 2.2 g | 0.7 g | 2% |
| Total sugars | 4.6 g | 1.4 g | – |
| Protein | 11 g | 3.3 g | 7% |
| Vitamin D | 0 µg | 0 µg | 0% |
| Calcium | 52 mg | 16 mg | 1% |
| Iron | 3.9 mg | 1.2 mg | 7% |
| Potassium | 117 mg | 36 mg | 1% |
| Vitamin A | 0 µg | 0 µg | 0% |
| Vitamin C | 0 mg | 0 mg | 0% |
% Daily Value is per serving (1 regular slice), using the FDA’s Daily Values. Calorie shares use 4 calories per gram of protein and carbs and 9 per gram of fat.
How long to walk it off
Walking at 3 mph, a 150-lb adult burns about 3.2 calories a minute on top of what they would burn at rest. So one regular slice of sourdough bread (84 calories) takes about 27 minutes of walking, roughly 3,000 steps.
Compare calories by serving
One regular slice of sourdough bread has 84 calories, about the same as a regular slice of rye bread (83 calories). The portions weigh 31 g and 32 g, respectively.
Related foods to explore
Sourdough bread questions
How much protein is in one regular slice of sourdough bread?
One regular slice of sourdough bread (31 g) has 3.3 g of protein, 7% of the 50 g Daily Value. That is 11 g per 100 g.
How many calories are in one thin slice of sourdough bread?
One thin slice of sourdough bread (24 g) has 65 calories: 0.6 g fat, 12 g carbs (0.5 g of it fiber) and 2.6 g protein.
Count it without looking it up.
Snap a photo of your meal and KaloCam estimates the calories and macros of everything on the plate. You can check and edit each item, and your day adds up on one screen.
See how KaloCam works →Sources
- USDA FoodData Central, Survey (FNDDS 2021–2023): Bread, sour dough (FDC ID 2707646, Survey (FNDDS), published 2024-10-31).
- U.S. Food and Drug Administration. Daily Value on the Nutrition and Supplement Facts Labels.
- Walking time: the method of our walking calorie calculator (2024 Adult Compendium of Physical Activities; CADENCE-Adults for steps).
Prepared by the KaloCam team · Updated