Biga Percentage for Pizza: Flour Share vs Biga Hydration

A Biga formula needs two separate percentages: how much of the total flour goes into it, and how much water it contains relative to its own flour. Saying “50% Biga” without specifying the basis leaves the recipe ambiguous.

The Biga calculator treats allocation as prefermented flour percentage. Biga hydration is a separate input, initially 45% as a planning example. Neither percentage establishes one baking temperature.

Work through 50% allocation at 45% hydration

Suppose the complete recipe uses 1,000 g total flour and 70% water:

Biga flour = 1,000 × 0.50 = 500 g
Biga water = 500 × 0.45 = 225 g
Fresh flour = 1,000 − 500 = 500 g
Fresh water = 700 − 225 = 475 g

The Biga contains 725 g flour and water before yeast. That is not 500 g of wet Biga. If you raise the Biga’s hydration to 50% while holding allocation steady, Biga water rises to 250 g and final water falls to 450 g. Final hydration remains 70%.

What “100% Biga” can mean

In flour-allocation terms, 100% means every gram of recipe flour is prefermented. It does not mean the Biga is liquid at 100% hydration. For a 45%-hydration Biga and 70% final hydration, all flour is already in the preferment and the final mix still adds the remaining water and other ingredients.

A high allocation is a workflow choice, not a requirement for an airy rim. It changes how much matured dough must be incorporated. Start with a complete recipe and compare the mixing result before increasing the allocation.

Reconcile flour, water and yeast separately

Preferment flour plus fresh flour must equal total flour. Preferment water plus fresh water must equal total water. The commercial yeast split must also sum to the complete recipe’s yeast, which is already included in dough mass.

If the specified Biga water exceeds the total recipe water, the requested combination is impossible without changing an input. The interface reports that constraint. Do not silently rename a lower-hydration capped preferment as the specified Biga.

Choose flour for the process you are running

Read the flour’s own technical data and the recipe’s guidance. W and protein percentage are different measurements; neither by itself guarantees a successful long preferment. The flour-strength guide explains the distinction.

For a direct comparison with a liquid preferment, keep final flour and water constant and use Poolish versus Biga. Observe maturity and dough handling rather than assuming one method always produces superior flavor or texture.