Homemade Sourdough Nutrition Calculator: Calories & Macros

🍞 Homemade Sourdough Nutrition Calculator

Calculate calories, protein, carbs, fat, and fiber per slice based on your recipe

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Calories
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Protein
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grams
Total Carbs
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grams
Dietary Fiber
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📊 Nutrition Per Slice by Flour Type (50g slice)
130
White (kcal)
110
Whole Wheat (kcal)
105
Rye (kcal)
145
Seeded (kcal)
120
Multigrain (kcal)
125
Spelt (kcal)
118
Einkorn (kcal)
40–60g
Typical Slice Wt.
🍞 Full Nutrition by Flour Type (per 100g baked bread)
Flour TypeCaloriesProteinCarbsFatFiber
White / Bread Flour265 kcal9g52g1.5g2g
Whole Wheat225 kcal10g44g2g6g
Rye210 kcal8g42g1.5g7g
Seeded (White + Seeds)290 kcal11g48g5g5g
Multigrain240 kcal10g46g2.5g5g
Spelt250 kcal11g50g2g4g
Einkorn236 kcal10g47g2g4g
💪 Sourdough vs Regular Bread (per 50g slice)
Bread TypeCaloriesProteinFiberGI Score
Homemade Sourdough (white)1304.5g1g~54 (Medium)
Homemade Sourdough (whole wheat)1105g3g~48 (Low)
Commercial White Bread1334g0.6g~75 (High)
Commercial Whole Wheat Bread1215g2g~69 (Medium)
Baguette (no sourdough)1385g0.8g~95 (Very High)
Rye Crispbread1053g4g~45 (Low)
📋 Macros per Slice by Loaf Size
Loaf SlicesSlice Weight (500g loaf)Calories (white)Calories (whole wheat)
8 slices~62g~165 kcal~140 kcal
10 slices~50g~133 kcal~113 kcal
12 slices~42g~111 kcal~95 kcal
14 slices~36g~95 kcal~81 kcal
16 slices~31g~82 kcal~70 kcal
🌱 Micronutrients in Sourdough (per 100g, whole wheat)
28mg
Magnesium
2.3mg
Iron
186mg
Potassium
0.4mg
Zinc
💡 Tip: Sourdough fermentation lowers the glycemic index compared to commercially yeasted bread. The lactic and acetic acids produced during fermentation slow starch digestion, making sourdough a better choice for blood sugar management.
💡 Tip: Adding seeds like sunflower, flax, or sesame significantly boosts the fat and calorie content. Each tablespoon of seeds (10g) adds roughly 50–60 calories and 4–5g of healthy fats. Account for this in your recipe calculations.
💡 Tip: The starter (levain) contributes minimally to the final nutrition since it makes up 15–20% of total dough weight and is mostly flour and water. The primary nutrition driver is the flour type and any added enrichments like olive oil or seeds.

Sourdough bread is bread that ferments naturally using a sourdough starter instead of commercial yeast or chemical agents like baking powder or baking soda. Alive culture from flour and water forms the starter that naturally raises the dough. You can make it, buy it or receive it from another baker

Naturally happening yeast and bacteria raise the mass in sourdough. They produce lactic acid that gives the bread its taste. That a bit bitter, racy aroma of the starter simply sticks.

What is sourdough bread?

Proteins in sourdough bread are more easily digestible for the body. The culture breaks down glutenin and gliadin so the bread becomes more tolerabel. It also destroys phytates that stop the absorption of minerals.

Good sourdough has light, airy insides and crisp brown crust outside. Classical recipe gives oval pain au levain with light sharpness and rich flavor.

Simple method for sourdough gives surprisingly racy results and is entirely soft. Without feeding of the starter, without kneading of the mass and without shaping of the loaf. Only mix, wait, lay the dough in a pan, wait more and bake a big loaf for sandwiches.

Strong white flour of good quality works for newcomers.

Common proportion for sourdough is 1:2:3, so one part starter, two parts water, three parts flour, everything by weight. Salt goes in at two percent of the flour mass. For instance: 100 g starter, 200 g water, 300 g flour and 6 g salt.

Other recipe uses 290 g water, 400 g flour, two spoons of salt and 90 g starter. Mix by hand in a bowl, leave it 20 minutes, later add salt and mix again.

For starter from scratch, mix two spoons whole grain flour with two spoons unsweetened pineapple juice or orange juice. Cover and leave at room temperature 24 hours. It requires both yeast and bacteria.

Yeast are not bacteria (they are fungi).

Sourdough is fun like a science experiment in the kitchen. It tastes good, which is enough. Before the 19th century it was the only available leavening.

You believe that it dates from around 10 000 BC. Home baking such bread from scratch are among the most thrilling things.

Homemade Sourdough Nutrition Calculator: Calories & Macros

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