What is the Sourdough Hydration Calculator?
The Sourdough Hydration Calculator is an advanced baking tool used to craft artisan bread. Sourdough requires precise chemical ratios between flour and water to achieve the perfect crumb structure. This calculator uses strict "Baker's Percentages" to easily scale recipes up for bakeries or down for a single home loaf.
How to Calculate Total Dough Hydration (Formulas)
Because sourdough "starter" (levain) is itself a mixture of flour and water, you must calculate the water hiding inside the starter to find the true hydration of the final dough ball.
- Total Flour: Dry Flour in bowl + Flour inside the starter.
- Total Water: Liquid Water poured in bowl + Water inside the starter.
- True Hydration %: (Total Water / Total Flour) * 100. (Conversions between g, kg, oz, and lbs are handled automatically by the calculator).
- Note: A standard 100% hydration starter is exactly 50% water and 50% flour by weight.
Frequently Asked Questions
Why is hydration so important in sourdough baking?
Hydration determines the physical characteristics of the final loaf. A lower hydration dough (65%) is stiff, easy to knead by hand, holds its shape well, and results in a tighter, sandwich-style crumb. A high hydration dough (75% to 85%) is wet, sticky, and incredibly difficult to handle, but creates the highly sought-after artisan crumb with massive, glossy air holes.
Why is my high-hydration dough completely liquid and unworkable?
Different flours absorb water differently based on their protein content. A high-protein bread flour (13%+) can easily absorb 80% hydration and form a strong gluten network. If you attempt an 80% hydration recipe using weak, cheap all-purpose supermarket flour (10% protein), it cannot absorb the water, resulting in a soupy, sticky puddle that will never hold its shape.
What does autolyse mean?
Autolyse is a crucial resting phase where you mix only the flour and water together (no salt or starter) and let it sit for 30 to 60 minutes. This gives the flour time to fully hydrate and jumpstarts gluten development enzymatically, making wet dough significantly easier to handle and stretch.