Nutrition & Food
Intermediate

Dough Hydration

Water as a percentage of flour — controls how wet and open a dough is.

Formula

H=mwatermflour×100H = \frac{m_{water}}{m_{flour}} \times 100

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Variables

m_{water}Water mass
m_{flour}Flour mass

Example

750 g / 1000 g ⇒ 75%

How it works

Dough hydration tells you how much water is present relative to the flour, expressed as a percentage. The formula works because flour is treated as the fixed base ingredient in bread-making, so comparing water mass to flour mass makes recipes easy to scale and compare. A higher hydration usually means a softer, stickier dough with larger air pockets, while a lower hydration gives a firmer dough that is easier to shape.

When to use it

Use this when adjusting bread, pizza, or sourdough recipes and you want to understand how wet the dough will feel. It is also useful for comparing different formulas or scaling a recipe up and down while keeping the same dough texture.

Worked example, step by step

Suppose a recipe uses 650 g of water and 900 g of flour. H = (m_water / m_flour) × 100 H = (650 / 900) × 100 H = 0.7222 × 100 H = 72.2% So the dough hydration is about 72%

Common mistakes to avoid

  • Using total dough mass instead of flour mass as the denominator
  • Forgetting to convert the result to a percentage by multiplying by 100
  • Mixing up grams and millilitres without checking that water mass and flour mass are both measured consistently

Did You Know?

Rustic ciabatta runs at 80%+ hydration, giving its big irregular holes, while bagels sit near a stiff 55%.

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Reviewed & maintained by the FormulaWon editorial teamLast reviewed September 2026