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Sourdough Tools

Free, no-signup tools to take the guesswork out of sourdough. Each one does the math so you can spend less time calculating and more time baking.

Sourdough Starter Calculator

Enter how much levain you need and how much starter you have on hand, and get the exact grams of starter, flour, and water to mix, the feed ratio, and an estimated time to peak based on your hydration, flour type, and kitchen temperature.

Open the calculator →
Sourdoughy app icon

Your pocket sourdough coach

The app runs this same calculator, then reminds you when your levain should be peaking and checks a photo of the jar with AI to confirm it is ready to mix.

Download Sourdoughy free