Calories in sourdough bread

French or Vienna style, includes sourdough. 272 kcal (1,138 kJ) per 100 g. Choose a portion below and every figure on the page updates.

Sourdough bread is a dense, starchy food: 100 g provides 272 kcal (1138 kJ), mostly from carbohydrate (about 52 g), with around 11 g of protein and little fat. USDA groups sourdough with French and Vienna-style white breads, so these values describe a typical white sourdough loaf. Like most bread, it also contributes a fair amount of sodium.

Where the energy comes from

Share of total energy contributed by each macronutrient, using the standard 4/4/9 kcal per gram factors:

Things worth knowing

• One medium 1 oz (28 g) slice has about 77 kcal (323 kJ), but sourdough is often cut thick: a 50 g slice has about 136 kcal (569 kJ) and 300 mg of sodium.
• White sourdough has almost the same energy as ordinary white sandwich bread (266 kcal per 100 g); fermentation changes flavour and texture far more than calories.
• Long fermentation may lower the glycaemic response a little compared with yeasted white bread, though results vary between loaves and studies.
• Wholemeal bread has more fibre: commercial whole-wheat bread has about 6 g per 100 g, against 2.2 g in white sourdough.

Converting these figures

One 1 slice (medium, 1 oz) of sourdough bread is 77 kcal, which is 323 kJ. To convert any other figure, divide kilojoules by 4.184 for calories, or use the converter on the home page.

It takes 88 g of sourdough bread to reach 1,000 kJ (239 kcal). See how that compares with other foods on the 1000 kJ to calories page.