Pizza Dough Hydration: How Water Changes Structure, Fermentation and Baking

Pizza Dough Hydration: How Water Changes Structure, Fermentation and Baking


Hydration is one of the most important variables in pizza dough.


In simple terms, hydration is the percentage of water compared with the weight of the flour. A dough made with 1,000 g of flour and 650 g of water has a hydration of 65%.


Changing hydration affects much more than softness. It influences dough structure, fermentation, extensibility, handling, oven spring and the final texture of the pizza.


What Does Hydration Really Change?


Water allows flour proteins to hydrate and form the gluten network that gives dough its structure.


Increasing hydration can produce a softer and more extensible dough, while lower hydration generally creates a firmer and easier-to-handle dough.


However, higher hydration does not automatically mean better pizza.


The correct hydration depends on several factors:

• flour strength and absorption capacity;
• fermentation time;
• dough temperature;
• mixing method;
• pizza style;
• oven temperature;
• baking time;
• experience of the pizzaiolo.

The objective is not to use the highest possible hydration, but to use the hydration that works correctly with the entire dough process.


Low Hydration Dough


Lower-hydration dough is usually firmer and easier to control.


It can be useful when:

• the flour has limited water absorption;
• the dough requires easier handling;
• the baking time is longer;
• a firmer structure is required;
• production conditions make very soft dough difficult to manage.

Lower hydration can also reduce stickiness during mixing, balling and stretching.


If hydration is too low, however, the dough may become tight, less extensible and more difficult to open.


High Hydration Dough


Higher hydration generally produces a softer dough with greater extensibility.


When properly managed, it can contribute to:

• a lighter internal structure;
• larger air pockets;
• improved expansion during baking;
• a softer crumb;
• increased moisture retention.

But high-hydration dough also requires greater control.


If the flour is unable to support the amount of water used, the dough may become weak, sticky and difficult to handle.


This is why hydration must always be matched to the characteristics of the flour.


Flour Absorption Matters


Not every flour can absorb the same quantity of water.


Protein content can be useful information, but it is not enough on its own to determine the ideal hydration.


Different flours behave differently depending on milling, wheat characteristics, strength and processing.


A professional approach is to test hydration progressively rather than immediately increasing the water significantly.


Small adjustments can reveal how the flour behaves during mixing, fermentation and baking.


Hydration and Fermentation


Hydration also influences fermentation.


A wetter dough generally allows greater mobility of enzymes and microorganisms inside the dough system.


This can affect fermentation speed, dough extensibility and maturation.


For this reason, increasing hydration may require adjustments to:

• yeast quantity;
• fermentation time;
• dough temperature;
• refrigeration;
• mixing.

Changing only the amount of water without considering the rest of the formula can lead to inconsistent results.


Hydration and Oven Temperature


The baking method is another important factor.


A pizza baked very quickly at high temperature behaves differently from one baked for several minutes at a lower temperature.


More water must eventually be converted into steam or evaporated during baking.


This means that hydration should always be considered together with oven temperature and baking time.


The ideal dough for one oven may not produce the same result in another oven.


Do Not Chase Hydration Numbers


It is common to see pizza dough described mainly by hydration percentage: 60%, 65%, 70%, 75% or even higher.


These numbers are useful, but they do not describe the complete dough.


Two doughs at exactly 70% hydration can behave completely differently because of variations in flour, fermentation, temperature and mixing.


Hydration should therefore be treated as one part of a complete technical system.


Build a Repeatable Dough Process


For consistent pizza production, record the main variables of every dough batch:

• flour quantity and type;
• hydration;
• yeast quantity;
• salt;
• final dough temperature;
• fermentation time;
• room temperature;
• refrigerator temperature;
• baking temperature.

Recording these values makes it much easier to understand why a dough performed well or poorly.


You can also use the Vincicoppolas Professional Pizza Dough Calculator to calculate and organise your pizza dough formula.


For a deeper technical approach to flour, fermentation, dough development and professional pizza production, visit the Professional Pizza Technical Manual.


© Vincicoppolas