Free sourdough calculators
The same math that runs inside the Banneton app, free in your browser. No sign-in, and nothing you type leaves your device.
Bake schedule planner
Work backward from when you want bread out of the oven, adjusted to your dough temperature.
Hydration calculator
Work out dough hydration, or the water you need for a target.
Baker’s percentage calculator
Turn a formula into exact weights and scale it to any batch.
Feeding-ratio calculator
How much flour and water to add when you feed your starter.
Bulk fermentation calculator
Estimate bulk fermentation time from your dough temperature.
If you would rather read first
The numbers make more sense alongside the method.