Dough Hydration Calculator
The single most important number in bread baking.
Hydration is the percentage of water relative to flour in a dough. A dough with 60% hydration has 60 grams of water for every 100 grams of flour. Hydration determines almost everything about bread: texture, crumb structure, crust thickness, rise behavior, and how sticky the dough is to work with.
Low-hydration doughs (55-60%) are firm, easy to handle, and make dense, sturdy breads like bagels. Medium hydration (65-70%) gives you classic sandwich bread, dinner rolls, and most pizza doughs. High hydration (75-85%) produces open, airy crumb typical of ciabatta, focaccia, and artisan sourdough, at the cost of being sticky and challenging to shape.
This calculator lets you enter your recipe's flour and water amounts to calculate hydration, or enter a target hydration and flour amount to calculate how much water to use. Understanding hydration transforms bread baking. Once you know what a 75% dough feels like, you can adapt any recipe intuitively.
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Hydration Guide
Hydration ranges and what they produce.
| Hydration | Feel | Use for |
|---|---|---|
| 50-55% | Very stiff | Bagels, hard rolls, pretzels |
| 60-65% | Firm | Dinner rolls, sandwich bread, pizza Napoletana |
| 65-70% | Medium | Classic bread, most pizza styles |
| 70-75% | Soft | Brioche, enriched breads, soft rolls |
| 75-80% | Loose | Ciabatta, artisan breads, focaccia |
| 80-90% | Very wet | Rustic artisan sourdough, wet focaccia |
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The Reference
Baker's percentages (including hydration) are calculated relative to flour weight. Flour is always 100%. Water percentage equals (water weight divided by flour weight) times 100. This is the standard professional baking framework.
For pre-ferments, the flour and water in the pre-ferment are added to the totals. If a recipe includes milk, eggs, oil, or other liquids, professional bakers often calculate liquid percentage rather than pure hydration. For quick estimation, treating non-water liquids as water gives acceptable results.
Hydration as the Master Variable
Hydration percentage is the single most important variable in bread baking after flour type. It determines texture, crumb structure, crust, and handling difficulty. Understanding hydration transforms your relationship with bread: instead of following recipes blindly, you can read a formula and predict the outcome.
At 55-60% hydration, dough is firm and easy to handle. Think bagels, pretzels, very dense sandwich loaves. At 65-68%, dough is medium-firm, the sweet spot for beginners learning to shape bread. Most traditional sandwich loaves and dinner rolls live here. At 70-75%, dough is soft and slightly tacky, classic for most artisan breads and quality pizza doughs.
At 75-82%, dough is wet and challenging. High-hydration sourdough lives here, producing the open, holey crumb characteristic of ciabatta and artisanal country breads. Above 85%, dough behaves like batter and requires specialized techniques. Each 5% hydration increase shifts the dough character measurably.
Flour Type Affects Effective Hydration
Whole wheat flour absorbs more water than white flour. Substituting 50% whole wheat for white flour requires increasing hydration by 3-5% to maintain the same dough feel. Rye flour absorbs the most. Bread flour (higher protein) absorbs more than all-purpose.
Even within the same flour type, brand-to-brand variation is significant. King Arthur bread flour behaves differently from Gold Medal bread flour. When moving between brands, expect to adjust hydration by 1-3% to match your previous results. This is why professional bakers often test new flour batches before using them in regular production.
Our baker's percentage calculator and sourdough calculator use hydration as a core input. Mastering hydration thinking opens the door to all other advanced bread topics.
How to Use
- Choose whether to calculate hydration from your recipe, or water from a target hydration.
- Enter the flour and water amounts, or target hydration.
- Get your answer plus a description of the dough character.
Frequently Asked Questions
What is the ideal hydration for pizza?
Depends on style. Neapolitan pizza: 60-63%. New York style: 62-65%. Detroit style or focaccia-like: 70-75%. Roman (thin and crispy): 55-60%. Higher hydration equals more open, airy crust but harder to stretch.
Why do bread recipes vary so much in hydration?
Different breads have different textures. Sourdough boules are often 75-80% hydration for open crumb. Sandwich bread is typically 60-65% for a tight, sliceable crumb. Bagels are 55% for chewy density. Matching hydration to intended texture is the core of bread baking.
Does flour type affect hydration?
Significantly. Whole wheat flour absorbs more water than white (use 5-10% more water). Bread flour absorbs more than all-purpose (use 2-5% more). Rye absorbs the most. When substituting flours, adjust hydration accordingly.
Can I bake bread at 70% hydration as a beginner?
Yes, but expect sticky dough. Use a dough scraper and wet hands rather than dusting with flour (which lowers your hydration). High-hydration doughs require practice. Start at 65-68% for confidence-building, move up as you get comfortable.
How do I adjust hydration if my flour is old or dry?
Old or very dry flour absorbs slightly more water. If your dough feels dry at the called-for hydration, add water 5-10 g at a time until it feels right. Flour absorption varies 2-5% between brands and even between bags.
What is the difference between hydration and total moisture?
Hydration typically refers to water only (the baker's percentage of water relative to flour). Total moisture includes other liquids: milk, eggs, etc. For enriched breads with lots of milk and eggs, total moisture is higher than hydration. Professional recipes usually specify hydration for standardization.
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