Home bakers struggle to convert between different yeast types without ruining recipes

Home bakers frequently need to substitute between fresh yeast, dry yeast, and sourdough starter, but lack a reliable conversion formula, causing failed batches, wasted ingredients, and frustration. Current solutions are scattered across forums and cookbooks with conflicting advice, forcing bakers to guess or experiment repeatedly. This is especially painful for sourdough enthusiasts trying to adapt traditional recipes or for those without consistent access to specific yeast types.