Dough Hydration

Dough hydration is the ratio of water weight to flour weight in a bread or pizza dough recipe, expressed as a percentage using the same baker's percentage convention where flour is always the 100% base. A dough described as 70% hydration contains water weighing 70% of the flour weight, for example 700g of water for every 1,000g of flour. The Pizza Dough Hydration Calculator converts between flour weight, water weight, and hydration percentage so a baker can hit a target hydration for any batch size.

Hydration is singled out from the rest of a dough's ingredients because it has an outsized effect on how the final dough behaves and bakes. Low hydration doughs, roughly 55% to 60%, are stiff, easy to shape, and hold their form well, making them common for bagels or dense sandwich loaves. Mid-range hydration, around 65% to 70%, is the most common range for everyday bread and pizza dough, offering a good balance of workability and crumb openness. High hydration doughs above 75% are wetter, stickier, and harder to shape by hand, but they typically produce a more open, irregular crumb structure prized in artisan breads like ciabatta and focaccia.

Hydration also interacts closely with flour protein content and fermentation time. Higher-protein bread flours can absorb and structurally support more water than all-purpose flour, and longer fermentation times allow enzymes to break down starches in ways that make a wetter dough easier to handle than the raw hydration number alone would suggest. This is why two bakers using the same hydration percentage but different flours or fermentation schedules can end up with noticeably different dough consistency.

Hydration % = (Water Weight ÷ Flour Weight) × 100

Where Water Weight is the total weight of water (and other liquid contributing moisture, such as milk or egg, in more advanced formulas) and Flour Weight is the total weight of all flour used, both measured in the same units, typically grams.

A pizza dough recipe uses 400g of flour and 260g of water.

Hydration % = (260 ÷ 400) × 100 = 65%

This 65% hydration produces a dough that is soft and pliable but still easy to stretch and shape by hand, typical of a classic hand-tossed or Neapolitan-style pizza base.

• Hydration is just baker's percentage applied to water: it follows the same baker's percentage convention where flour is fixed at 100% and every other ingredient, including water, is measured against it.
• Higher hydration generally means a more open crumb: extra water creates more steam during baking, which pushes gas bubbles to expand further and produces larger, more irregular holes in the finished crumb.
• Flour protein content limits practical hydration: bread flour with 12% to 14% protein can typically support noticeably higher hydration than all-purpose flour before the dough becomes too slack to shape.
• Whole grain flours need extra water to reach the same feel: bran and germ particles in whole wheat flour absorb more moisture, so a whole wheat formula often needs 5 to 10 percentage points more hydration than an equivalent white flour formula.
• Hydration above roughly 75% requires different handling: very wet doughs are usually mixed and shaped using stretch-and-fold or slap-and-fold techniques rather than conventional kneading, since traditional kneading becomes impractical once the dough is too sticky to handle on a board.