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.

Hydration calculator

Work out dough hydration, or the water you need for a target.

Turn a formula into exact weights and scale it to any batch.

How much flour and water to add when you feed your starter.

Estimate bulk fermentation time from your dough temperature.