Sourdough Ratio Calculator
Calculate Your Dough
Enter your desired flour amount and percentages to calculate the ingredient weights for your sourdough bread.
Results:
Water to Add: 335 g
Starter Amount: 100 g
Salt Amount: 10 g
Total Flour: 550 g
Total Water: 385 g
Formula Used: Calculations are based on baker’s percentages relative to the *main* flour amount for starter and salt, and *total* flour for hydration. We account for the flour and water already in your starter.
| Component | Weight (g) | Percentage of Total Flour |
|---|---|---|
| Total Flour | 550 | 100.00% |
| Total Water | 385 | 70.00% |
| Starter | 100 | 18.18% |
| Salt | 10 | 1.82% |
| Total Dough | 945 | – |
Breakdown of dough components and their weights.
Visual representation of ingredient weights in the dough.
What is a Sourdough Ratio Calculator?
A sourdough ratio calculator is a tool used by bakers to determine the precise amounts of flour, water, starter, and salt needed to make sourdough bread based on desired percentages, often called baker’s percentages. It simplifies the process of scaling recipes and adjusting hydration, starter amount, and salt content while accounting for the flour and water already present in the sourdough starter.
Anyone who bakes sourdough bread, from beginners to experienced bakers, can benefit from a sourdough ratio calculator. It helps maintain consistency, experiment with different formulas, and easily scale recipes up or down. For beginners, it demystifies the ratios, and for experts, it allows for quick adjustments and calculations for new recipes.
A common misconception is that you must strictly adhere to one specific set of ratios. In reality, the sourdough ratio calculator is a tool to explore different hydrations and starter amounts to achieve various dough characteristics and bread outcomes. There’s no single “correct” ratio; it depends on your flour, environment, and desired bread.
Sourdough Ratio Calculator Formula and Mathematical Explanation
The sourdough ratio calculator uses standard baker’s percentages, but with a key adjustment for the starter’s contribution of flour and water.
- Starter Amount: Calculated based on the initial flour amount and the desired starter percentage. `Starter Amount = Flour Amount * (Starter Percentage / 100)`
- Flour and Water in Starter: Assuming the starter’s hydration, we find the flour and water it contains. For a 100% hydration starter: `Flour in Starter = Starter Amount / 2`, `Water in Starter = Starter Amount / 2`. More generally: `Flour in Starter = Starter Amount / (1 + (Starter Hydration / 100))`, `Water in Starter = Starter Amount – Flour in Starter`.
- Total Flour: The sum of the initial flour and the flour from the starter. `Total Flour = Flour Amount + Flour in Starter`
- Total Water Needed: Based on the desired hydration percentage of the total flour. `Total Water Needed = Total Flour * (Hydration Percentage / 100)`
- Water to Add: The difference between the total water needed and the water already in the starter. `Water to Add = Total Water Needed – Water in Starter`
- Salt Amount: Calculated based on the initial flour amount and salt percentage. `Salt Amount = Flour Amount * (Salt Percentage / 100)`
- Total Dough Weight: Sum of initial flour, water to add, starter amount, and salt amount. `Total Dough Weight = Flour Amount + Water to Add + Starter Amount + Salt Amount`
Variables Table:
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Flour Amount | Initial flour added to the dough | grams (g) | 300 – 1000 g |
| Hydration % | Total water as % of total flour | % | 60 – 90 % |
| Starter % | Starter weight as % of initial flour | % | 10 – 40 % |
| Starter Hydration % | Water as % of flour within the starter | % | 50 – 150 % (often 100%) |
| Salt % | Salt weight as % of initial flour | % | 1.8 – 2.5 % |
Practical Examples (Real-World Use Cases)
Example 1: Basic White Sourdough
Let’s say you want to make a loaf using 500g of white bread flour, aiming for 72% hydration, with 20% starter (100% hydration), and 2% salt.
- Flour Amount: 500g
- Hydration: 72%
- Starter Percentage: 20%
- Starter Hydration: 100%
- Salt Percentage: 2%
Using the sourdough ratio calculator:
- Starter Amount: 100g (50g flour, 50g water)
- Total Flour: 550g
- Total Water: 396g
- Water to Add: 346g
- Salt: 10g
- Total Dough Weight: 956g
You would mix 500g flour, 346g water, 100g starter, and 10g salt.
Example 2: Higher Hydration Whole Wheat Blend
You want to use 400g bread flour and 100g whole wheat (total 500g initial flour), targeting 80% hydration, 15% starter (100% hydration), and 2.2% salt.
- Flour Amount: 500g (400g bread + 100g whole wheat)
- Hydration: 80%
- Starter Percentage: 15%
- Starter Hydration: 100%
- Salt Percentage: 2.2%
The sourdough ratio calculator would give:
- Starter Amount: 75g (37.5g flour, 37.5g water)
- Total Flour: 537.5g
- Total Water: 430g
- Water to Add: 392.5g (approx. 393g)
- Salt: 11g
- Total Dough Weight: 978.5g
You’d mix 500g flour blend, 393g water, 75g starter, and 11g salt. See our guide on {related_keywords[0]} for more on flour blends.
How to Use This Sourdough Ratio Calculator
- Enter Flour Amount: Start with the amount of flour (excluding starter) you want to use for your main dough in grams.
- Set Hydration: Input your desired final hydration percentage. This is the total water relative to the total flour (including that from the starter).
- Set Starter Percentage: Decide how much starter you want to use as a percentage of your initial flour amount.
- Set Starter Hydration: Enter the hydration of your starter (most are 100%, meaning equal parts flour and water by weight).
- Set Salt Percentage: Input the salt percentage, usually calculated against the initial flour amount.
- View Results: The calculator instantly updates the “Water to Add,” “Starter Amount,” “Salt Amount,” “Total Flour,” “Total Water,” and “Total Dough Weight.”
- Read the Table and Chart: The table and chart give you a clear breakdown of the components by weight.
- Adjust and Experiment: Change the input values to see how they affect the final dough composition. Use the sourdough ratio calculator to fine-tune your recipe.
The results guide you in measuring the exact ingredients to mix. For instance, if it says “Water to Add: 335 g,” you measure 335g of water to add to your other ingredients.
Key Factors That Affect Sourdough Ratio Calculator Results
- Flour Type: Whole wheat and rye flours absorb more water than white flour. You might need a higher hydration percentage with these flours, which you input into the sourdough ratio calculator. Our {related_keywords[1]} page discusses this.
- Desired Hydration: Higher hydration leads to a wetter, more open crumb but can be harder to handle. The sourdough ratio calculator helps you hit the exact hydration.
- Starter Activity & Percentage: A more active starter or a higher percentage will speed up fermentation. The calculator adjusts ingredient weights based on starter percentage.
- Ambient Temperature & Humidity: Warmer temperatures accelerate fermentation. While not a direct input, it influences your choice of starter percentage, which the sourdough ratio calculator uses.
- Starter Hydration: If your starter isn’t 100% hydration, accurately inputting its hydration is crucial for the sourdough ratio calculator to correctly determine the water to add.
- Salt Percentage: Salt controls fermentation rate and strengthens gluten. The calculator ensures you add the right amount relative to your flour. Check our {related_keywords[2]} tips.
Frequently Asked Questions (FAQ)
- What is baker’s percentage?
- Baker’s percentage expresses each ingredient’s weight as a percentage of the total flour weight. However, with sourdough, it gets slightly more complex due to the flour and water in the starter, which this sourdough ratio calculator handles.
- Why does the calculator ask for starter hydration?
- Because the starter contains both flour and water, and the amount of each depends on its hydration. The sourdough ratio calculator needs this to accurately calculate the total flour and water in your final dough and how much extra water you need to add.
- Can I use this calculator for different types of flour?
- Yes, but you might adjust the target hydration. Whole grain flours typically require higher hydration. Use the sourdough ratio calculator to find the right water amount for your chosen hydration and flours.
- What’s a typical starter percentage?
- It ranges from 10% to 40% (of the main flour weight). Lower percentages mean longer fermentation, higher percentages mean shorter. The sourdough ratio calculator lets you experiment.
- How does salt percentage affect the dough?
- Salt (usually 1.8-2.5% of main flour) controls yeast activity, tightens gluten, and adds flavor. The calculator helps you add the precise amount.
- What if my starter is very stiff or very liquid?
- Estimate its hydration and input it into the “Starter Hydration” field of the sourdough ratio calculator. A stiff starter might be 50-60% hydration, a liquid one 120-150%.
- How do I scale my recipe using the calculator?
- Simply change the “Flour Amount” in the sourdough ratio calculator to your desired new amount, keeping the percentages the same, and it will give you the new ingredient weights.
- Does this calculator work for enriched doughs (with eggs, milk, sugar)?
- This sourdough ratio calculator is primarily for the basic flour, water, starter, and salt ratios. While you can calculate these base ingredients, you’d add enrichments separately, though they can affect the feel of the hydration. Explore our {related_keywords[3]} recipes for ideas.