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Calcimator

Sourdough Starter Calculator

Calculate flour, water, and starter amounts for feeding your sourdough starter. Adjust hydration, inoculation rate, and feeding schedule.

Inputs

Results

Flour

80 g

Water80 g
Existing Starter40 g
Est. Peak Time6 hrs
Actual Hydration100%
How to Use This Calculator
  1. Enter the target total weight of finished starter in grams.
  2. Set the desired hydration percentage (100% = equal flour and water by weight).
  3. Enter the inoculation percentage (existing mature starter as % of new batch).
  4. Select your feeding schedule (once or twice daily).
  5. The calculator shows flour, water, and existing starter amounts, estimated peak time, and actual hydration.
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