Calories in sourdough bread (sourdough)
Calories, protein, carbohydrate and fat per 100 g and per serving, from the USDA reference database — plus what actually changes the number on your plate.
Short answer
100 g of sourdough bread (sourdough) contains 272 kcal, with 10.8 g of protein, 51.9 g of carbohydrate and 2.4 g of fat.
A typical serving — 1 slice, about 64 g — is roughly 174 kcal.
That is a fairly calorie-dense food, so portion size matters.
Nutrition facts
| Nutrient | Per 100 g | 1 slice (64 g) |
|---|---|---|
| Calories | 272 kcal | 174 kcal |
| Protein | 10.8 g | 6.9 g |
| Carbohydrates | 51.9 g | 33.2 g |
| Sugars | 4.6 g | 3 g |
| Fibre | 2.2 g | 1.4 g |
| Fat | 2.4 g | 1.5 g |
| Saturated fat | 0.5 g | 0.3 g |
| Cholesterol | 0 mg | 0 mg |
| Sodium | 602 mg | 385 mg |
| Potassium | 117 mg | 75 mg |
| Calcium | 52 mg | 33 mg |
| Iron | 3.9 mg | 2.5 mg |
| Vitamin C | 0 mg | 0 mg |
| Water | 33 g | 21 g |
Calories per serving
| Serving | Weight | Calories | Protein | Carbohydrates | Fat |
|---|---|---|---|---|---|
| 1 slice | 64 g | 174 | 6.9 g | 33.2 g | 1.5 g |
Photograph it instead of looking it up
Wellix identifies sourdough bread on your plate, estimates the portion and logs calories, protein, carbs and fat in seconds. Free to start on iPhone and Android.
Calories by weight
Use this table when you know the weight but not the serving:
| Amount | Calories | Protein | Carbohydrates | Fat |
|---|---|---|---|---|
| 25 g | 68 | 2.7 g | 13 g | 0.6 g |
| 50 g | 136 | 5.4 g | 25.9 g | 1.2 g |
| 100 g | 272 | 10.8 g | 51.9 g | 2.4 g |
| 150 g | 408 | 16.1 g | 77.8 g | 3.6 g |
| 200 g | 544 | 21.5 g | 103.8 g | 4.8 g |
| 250 g | 680 | 26.9 g | 129.7 g | 6.1 g |
| 300 g | 816 | 32.3 g | 155.6 g | 7.3 g |
Where the calories come from
Calories come from three macronutrients: protein and carbohydrate at 4 kcal per gram, fat at 9 kcal per gram. For sourdough bread (sourdough) the split is:
- Protein: 10.8 g × 4 = 43 kcal — 16% of calories
- Carbohydrates: 51.9 g × 4 = 208 kcal — 76% of calories
- Fat: 2.4 g × 9 = 22 kcal — 8% of calories
- Most of the energy in sourdough bread (sourdough) comes from carbohydrate (76% of calories).
- It is high in sodium: 602 mg per 100 g.
- For 200 kcal you can eat about 75 g.
Compare preparations
The same food, prepared differently. Cooking removes water (so calories per 100 g rise), adds fat (so they rise further), or both.
| Preparation | Calories | Protein | Carbohydrates | Fat |
|---|---|---|---|---|
| White bread (white) | 266 | 8.9 g | 49.4 g | 3.3 g |
| Whole wheat bread (whole wheat) | 252 | 12.5 g | 42.7 g | 3.5 g |
| Rye bread (rye) | 259 | 8.5 g | 48.3 g | 3.3 g |
| Sourdough bread (sourdough)this page | 272 | 10.8 g | 51.9 g | 2.4 g |
| Multigrain bread (multigrain) | 265 | 13.4 g | 43.3 g | 4.2 g |
| Pita bread (pita) | 275 | 9.1 g | 55.7 g | 1.2 g |
| Naan (naan) | 291 | 9.6 g | 50.4 g | 5.7 g |
| Bagel (plain) | 264 | 10.6 g | 52.4 g | 1.3 g |
What actually changes the number
Sourdough is 272 kcal per 100 g, like any white bread, and the slices are big: a bakery slice is often 60–80 g, or 165–220 kcal. Fermentation improves digestibility, not the calorie count.
How accurate are these numbers?
The values on this page are reference averages from the USDA FoodData Central database (SR Legacy release), measured on samples of sourdough bread as sold and prepared in the United States. Your portion will differ: produce varies by variety and ripeness, meat by cut and trim, and anything cooked by the fat and water it gained or lost.
For most foods the per-100 g figure is reliable to within about 10%. The larger uncertainty is almost always the weight of what is on your plate and the cooking fat you cannot see — the two things worth checking before you worry about the database.
How accurate are AI calorie counting apps? →
Related foods
More in Grains, rice, pasta and bread →
Frequently asked questions
How many calories are in 100 g of sourdough bread?
100 g of sourdough bread (sourdough) contains 272 kcal (10.8 g protein, 51.9 g carbohydrate, 2.4 g fat), according to USDA reference data.
How many calories are in a serving of sourdough bread?
A typical serving of sourdough bread — 1 slice, about 64 g — has roughly 174 kcal. Weigh your own portion once to see how it compares; serving sizes vary more than the food does.
How much protein is in sourdough bread?
Sourdough bread (sourdough): 10.8 g of protein per 100 g, which is moderate. Foods above about 15–20 g per 100 g, or where protein supplies a third or more of the calories, are usually considered high-protein.
What amount of sourdough bread equals 200 kcal?
At 272 kcal per 100 g, about 75 g of sourdough bread equals 200 kcal.
Can I track sourdough bread by taking a photo?
Yes. A photo calorie app like Wellix identifies sourdough bread on the plate and estimates the portion from the image. The estimate is most accurate when you confirm the weight or the count, and tell the app about anything the camera cannot see — cooking oil, butter, dressings and sauces.
Source
Nutrition data: U.S. Department of Agriculture, FoodData Central — SR Legacy, FDC ID 172675: "Bread, french or vienna (includes sourdough)". Values are per 100 g of edible portion. Serving weights are USDA household measures or typical retail sizes; check the label where one exists. View the USDA record.
Wellix provides general nutrition information and is not medical advice. Nutrition values are reference averages and individual foods vary. Consult a qualified healthcare professional before making significant dietary changes.
Photograph it instead of looking it up
Wellix identifies sourdough bread on your plate, estimates the portion and logs calories, protein, carbs and fat in seconds. Free to start on iPhone and Android.
