Flour Variance
Swap flours—rye, spelt, whole wheat—and watch how peak fermentation timing and window width shift in real time.
Select your flour blend, and the calculator adjusts for enzymatic activity and water absorption differences. Rye ferments faster due to natural amylase and less gluten, so its peak window is narrower—often just 1–2 hours at room temp. Whole wheat slows things slightly but adds depth; spelt behaves like white flour but overproofs more easily. The model reflects these nuances without requiring trial and error.
Each flour type changes how microbes access starches and sugars. Rye’s high pentosans create a looser dough that traps less gas, shortening the rise window. Whole grain starches feed yeast longer but require more time to hydrate fully, pushing peak activity later. You’ll see predicted peaks shift—rye by +2 hours, whole wheat by −30 minutes—so you know when to bake, not guess.
Mixing flours adjusts the curve too: 20% rye in white flour speeds things up just enough to sharpen sour notes, while over 50% whole wheat may extend peak activity by over an hour. Use the variance tool to decide how much each grain contributes to your timeline, helping you balance predictability with flavor ambition.
