sourdoughy
Ultimate Guide to Sourdough Hydration
Understanding sourdough hydration is one of the most important skills for any baker. Hydration—the ratio of water to flour in your dough—directly affects your bread's texture, crumb structure, and how easy it is to work with. This guide covers everything you need to know. Use our sourdough hydration calculator to get precise measurements for any hydration level.
What Is Sourdough Hydration?
Sourdough hydration percentage is the ratio of water to flour in your dough, expressed as a percentage. If a recipe calls for 70% hydration, that means for every 100g of flour, you use 70g of water.
Hydration affects nearly every aspect of your bread: how open or closed the crumb is, how crisp the crust becomes, how sticky the dough feels during shaping, and how long fermentation takes.
The Sourdough Hydration Chart: From 60% to 100%
60-65% Hydration: Low Hydration Sourdough
Low hydration doughs are firm and easy to handle. They produce a tight, uniform crumb—think classic sandwich bread or bagels. Best for beginners, intricate shapes, or denser, chewier texture.
65-72% Hydration: Beginner-Friendly Range
This is the sweet spot for new sourdough bakers. The dough is manageable but still develops good gluten structure. Our sourdough hydration calculator defaults to 72% for good reason.
72-78% Hydration: The Artisan Standard
Most artisan sourdough recipes fall in this range. You get that desirable open, holey crumb while still being able to shape the dough confidently.
78-85% Hydration: High Hydration Sourdough
High hydration doughs create those dramatic, irregular holes. The crumb is airy and moist; the crust crackles. But the dough is sticky and requires confident technique. Not recommended for beginners.
85-100% Hydration: Expert Territory
Very high hydration produces ciabatta-style bread with an extremely open crumb. The dough is more like a thick batter. Requires strong flour and experienced technique.
70 vs 80 Percent Hydration Sourdough
70% hydration dough is noticeably firmer. It holds its shape well, is easy to score, and produces a more uniform crumb. 80% hydration dough is softer and stickier, with larger, more irregular holes and a thinner, crispier crust.
Your flour matters: bread flour can handle higher hydration than all-purpose. Whole wheat and rye absorb more water—our calculator adjusts for this automatically.
How to Calculate Sourdough Hydration (Including Starter)
Your sourdough starter contains both flour and water. A 100% hydration starter has equal parts—so 50g of starter = 25g flour + 25g water. You must include these in your totals.
Step-by-step: 1) Determine your starter's hydration (usually 100%). 2) Calculate flour and water in your starter amount. 3) Add main dough flour and water. 4) Total hydration = Total water ÷ Total flour × 100.
This math is tedious by hand. Our sourdough hydration calculator does it instantly. Also read our step-by-step hydration calculation guide.
Best Hydration for Beginner Sourdough
Start at 70-72% hydration. Use bread flour for better structure. This gives you a forgiving dough. As you gain confidence, increase by 2-3% per bake.
Whole Wheat and Rye: Hydration Adjustments
Whole grains absorb more water. Whole wheat typically needs 3-5% more hydration than white flour; rye needs even more. Our calculator's flour mix options automatically adjust. See our baker's percentage guide.
Common Hydration Mistakes
Mistake 1: Ignoring starter in calculations. Mistake 2: Using volume measurements—hydration requires weight. Mistake 3: Adding flour during shaping. Use wet hands instead. Mistake 4: Jumping to high hydration too soon. Build skills at 70-75% first. See our common sourdough mistakes guide.
Frequently Asked Questions
75% hydration means 75g water per 100g flour. It's a medium level—balanced between open crumb and manageable dough.
Yes. 100% hydration (equal flour and water) is the standard. Easy to maintain. Our calculator uses this default.
Hydration = (Total water ÷ Total flour) × 100. Include water and flour from your starter. Use our sourdough hydration calculator to avoid errors.
70-75%. The dough is easier to handle and shape. Master this range before trying 80%+.
Higher hydration = more open crumb, crispier crust, stickier dough. Lower = denser crumb, easier handling.
Add starter's flour and water to your totals. Formula: (dough water + starter water) ÷ (dough flour + starter flour) × 100. Our calculator does this automatically.
Disclaimer: Baking results vary based on flour type, ambient temperature, starter health, and technique. Use this guide and our sourdough hydration calculator as a starting point, then adjust to your conditions.