Calculate the hydration percentage of your bread dough to get consistent results every time. This tool helps home bakers adjust flour and water ratios for different bread styles. It works for sourdough, sandwich loaves, baguettes, and more.
How to Use This Tool
Start by selecting your preferred measurement unit (grams, ounces, or pounds) from the dropdown menu. Enter the total weight of flour and water you plan to use in your dough. If you are using a sourdough starter, check the "Include Sourdough Starter" box and enter the starter weight and its hydration percentage (default is 100% for equal parts flour and water). Click "Calculate Hydration" to see your results, or "Reset" to clear all inputs. Use the copy button to save your results to your clipboard.
Formula and Logic
Bread hydration is calculated as the ratio of total water weight to total flour weight, multiplied by 100 to get a percentage. For sourdough recipes, the flour and water content of the starter is included in the total calculations.
The starter flour and water are derived using the starter hydration percentage: starter flour = starter weight / (1 + (starter hydration % / 100)), and starter water = starter flour * (starter hydration % / 100).
The full calculation steps are:
- Measure recipe flour and water weights in your chosen unit.
- If using starter, calculate starter flour and water based on starter weight and hydration.
- Sum recipe and starter flour for total flour, repeat for water.
- Divide total water by total flour, multiply by 100 to get hydration percentage.
- Add total flour and water to get total dough weight.
Practical Notes
Home bakers can use these tips to get the most out of their hydration calculations:
- Standard bread hydration ranges from 60% (dense sandwich loaves) to 80% (open crumb artisan breads).
- High hydration doughs (75%+) are stickier and require longer fermentation or folding to develop gluten.
- If substituting volume measurements (cups) for weight, note that 1 cup of all-purpose flour is approximately 120g, but weight measurements are far more accurate for consistent results.
- Sourdough starter hydration above 100% will make dough stickier, while lower hydration starters (e.g. 50%) will produce drier dough.
- Adjust flour or water incrementally (5-10g at a time) to reach your desired hydration, rather than large batches.
Why This Tool Is Useful
Consistent bread hydration is the key to predictable results when baking. This tool eliminates guesswork, so you can replicate successful loaves or adjust recipes for different bread styles. It accounts for sourdough starter, which is often overlooked in basic hydration calculators, making it suitable for both beginner and experienced bakers. You can also use it to scale recipes up or down by adjusting flour and water weights while maintaining your target hydration.
Frequently Asked Questions
Does starter hydration affect the final dough hydration?
Yes, sourdough starter is a mixture of flour and water, so its hydration directly impacts the total water and flour in your dough. This tool automatically accounts for starter contributions when you include starter details.
What is a good hydration level for beginners?
Beginners should start with 65-70% hydration, which produces manageable dough that is easy to shape and still has a good crumb. Higher hydration doughs require more experience to handle without deflating.
Can I use volume measurements instead of weight?
Weight measurements are strongly recommended for accuracy, as volume measurements (cups, tablespoons) vary based on how ingredients are packed. If you must use volume, convert to weight using standard conversion rates (e.g. 1 cup flour ≈ 120g, 1 cup water ≈ 240g) before entering values.
Additional Guidance
When adjusting recipes, keep in mind that different flours absorb water differently: whole wheat flour absorbs more water than all-purpose, so you may need to increase hydration by 5-10% for whole grain loaves. Store your calculated ratios in a baking journal to track which hydrations work best for your oven, flour, and preferred bread styles. If dough feels too sticky even at your target hydration, add 5g of flour at a time until it reaches the desired consistency, then recalculate to see your new hydration percentage.