Good bread starts with a useful plan.
Free sourdough calculators and practical tools. Get the weights, make a mark, and find the kitchen time your recipe needs.
Sourdough Starter Feeding Calculator
Calculate starter, flour and water from your feeding ratio, a bake quantity plus reserve, or the starter you retain.
Open tool →Find your baking windowSourdough Schedule Calculator
Work backwards from serving time through cooling, baking and fermentation, then check hands-on steps against the hours you are home.
Open tool →Understand the doughSourdough Hydration Calculator
Calculate total dough hydration including your starter, with separate flour and water contributions for liquid or stiff starter.
Open tool →Read the riseSourdough Percentage Rise Calculator
Turn starting and current container readings into percentage dough rise, and calculate the mark for a recipe’s target rise.
Open tool →Use what is in the jarSourdough Discard Recipes by Grams Available
Find published sourdough discard recipes for 100, 113, 200 or 227 grams, with equipment and planning notes before you mix.
Open tool →Keep the recipe and the dough in the decision.
The arithmetic is exact before rounding. Fermentation is a living process: feeding ratios do not promise a peak time, and a schedule cannot decide whether dough is ready. Each tool shows its formula, a worked example and the conditions to check.
Read the Baker’s Journal for the method behind each calculation. Every tool works without an account, and print views keep your result close to the mixing bowl.