Sourdough Calculator

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Scale a sourdough formula without doing baker's-percentage arithmetic on the floury side of a notebook.

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About this tool

How it works

The calculation assumes a 100% hydration starter and subtracts the flour and water contributed by that starter from the requested final hydration.

Example

Start with 1,000 g total flour, 70% hydration, 20% starter, and 2% salt.

Private by default

The calculation or transformation happens in this browser. There is no account, and the values you enter are not sent to Naughty Bear Labs.

Install Sourdough

Open your browser menu and choose Install app or Add to Home screen.