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THE FEUTEX TOOLKIT

Sourdough Starter Hydration Accounting

Account for flour and water already present in a starter before mixing the final dough.

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FormulaAdd flour = total_flour-starter/(1+starter_hydration/100); Add water = total_flour*target_hydration/100-starter*starter_hydration/(100+starter_hydration); Prefermented = 100*starter/(1+starter_hydration/100)/total_flour
Sources and model references

Worked example

Inputs

Starter
200 g
Starter hydration
100 %
Total flour
1000 g
Target hydration
70 %

Expected results

Add flour
900 g
Add water
600 g
Prefermented
10 %

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter the measured quantities and your own planning assumptions.
  2. Review all calculated outputs and the stated limitations.

Try this example

{
  "starter": 200,
  "starter_hydration": 100,
  "total_flour": 1000,
  "target_hydration": 70
}

Accuracy and scope

Planning estimate using the assumptions you enter; verify dimensions and real operating constraints before purchase or use.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.