Scale from flour weight
Use known flour weight when you already know how much flour you want to use.
Water, starter, salt, and optional ingredients are calculated from flour.
Scale from target dough weight
Use target dough weight when you need a specific loaf or batch size.
For sourdough, starter flour and water should be included in total flour and total water.
Related calculators
DoughMath guides are educational explanations for formula math. Use the linked calculators for exact weights before baking.