Free sourdough calculators

Small calculators that run in your browser, with no sign-up and no tracking. Each one is unit-tested against published worked examples.

• Sourdough Hydration Calculator (Baker's Percentage)

  Free baker's percentage calculator: enter dough weight or flour weight, hydration, salt and starter, and get grams with the starter's flour and water counted.

• Sourdough Discard Swap Calculator (Any Hydration)

  Work out how much flour and liquid to take out of a recipe when you add sourdough discard, for a starter at any hydration.

• Mixing Water Temperature Calculator for Sourdough

  Find the water temperature that gets your sourdough to its target dough temperature, using the desired dough temperature formula. Works in °F or °C.