Independent buying guides for sourdough baking

Sourdough Hydration Calculator

Pick your total dough weight and hydration. The calculator counts the flour and water inside your starter so the real hydration is what you asked for.

Result

Flour to add
466 g
Water to add
321 g
Starter
103 g
Salt
10.3 g
Total flour (incl. starter)
517 g

Higher hydration gives a more open crumb but is harder to shape. 65-75% is a comfortable range for most home bakers.

How this calculator works

Baker's percentages are relative to total flour, including flour in the starter. Total flour = dough weight / (1 + hydration + salt). Starter = total flour x starter %, split into flour and water by starter hydration. The remaining flour and water are what you add.