Sourdough calculators
Honest baker's math for every step, from feeding your starter to scaling the final dough. Free, no sign-up, and everything runs in your browser.
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Sourdough Hydration Calculator
Find your dough's true hydration with the starter's flour and water counted in, plus baker's percentages and a reverse mode for target hydration.
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Sourdough Starter Feeding Calculator
Grams of starter, flour and water for any feeding ratio, plus an estimated time to peak at your kitchen temperature.
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Levain Build Calculator
Build exactly the levain your recipe needs: starter, flour and water in grams from the levain weight or percentage, with a buffer.
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Bulk Fermentation Calculator
Estimate how long bulk fermentation will take from your dough temperature and starter percentage, and how much rise to aim for.
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Baker's Percentage Recipe Scaler
Convert any bread recipe to baker's percentages and scale it to more loaves, a target dough weight or a simple multiplier.
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