How to Read a Pizza Dough Hydration Percentage and Why It Matters

Hydration percentage is one of the most useful numbers in pizza dough science, but it's also one of the most misunderstood by home cooks trying to improve their results. Here's a practical breakdown of what the number means and how to actually use it.

1. What the percentage actually represents
Hydration percentage is calculated as the weight of water divided by the weight of flour, expressed as a percentage — so a dough with 1000 grams of flour and 700 grams of water is at 70% hydration. It has nothing to do with how the dough feels when you first mix it, only the ratio used to build it.

2. What low versus high hydration does to texture
Doughs around 55-60% hydration are easier to handle and shape, producing a denser, more uniform crumb well-suited to thicker styles like Sicilian or pan pizza. Doughs at 70% or higher are stickier and harder to work with by hand, but reward the extra effort with a lighter, more open, irregular crumb typical of Neapolitan-style pizza.

3. Why higher hydration doesn't automatically mean better
It's a common misconception that higher hydration always produces a superior pizza, but the right hydration level actually depends on the style you're going for and your equipment. A very high hydration dough baked in a home oven that can't reach true pizza-oven temperatures often results in a gummy, underbaked crumb rather than the airy texture it would achieve in a proper high-heat setting.

4. How to adjust hydration if you're experimenting
Small changes matter more than they seem — moving from 65% to 70% hydration is a meaningful shift in how the dough behaves, not a minor tweak. Home bakers experimenting with hydration should change it in small increments, five percentage points at a time, and note the results, rather than jumping straight to an ambitious 80% dough without intermediate experience.

5. Why flour type changes the ideal hydration target
Different flours absorb water differently, meaning a hydration percentage that works well with one flour type may behave completely differently with another, particularly whole wheat or ancient grain flours, which typically require slightly higher hydration to achieve a similar texture to refined white flour. This is why recipe hydration percentages aren't always directly transferable between different flour brands or types.

Understanding hydration percentage turns pizza dough from a guessing game into something closer to a controllable formula, which is exactly why serious home bakers and craft pizzerias alike treat it as a starting point for troubleshooting rather than an afterthought.