The key idea

Whole-grain flour is a category, not a single ingredient. A wheat-heavy blend and a rye-heavy blend can share a hydration percentage without producing the same dough structure.

What to compare

Identify the grain and milling before comparing formulas. A rest containing starter is a starter-inclusive rest; a flour-and-water autolyse is a different stage.

Quantities in this example

  • 500 g whole-grain flour
  • 350 g water
  • 10 g salt
  • 150 g active sourdough starter

Reading the numbers

100% hydration starter

575 g total flour, 425 g total water, 73.9% hydration, 1.74% salt, 13.0% prefermented flour

Continue reading

For quantities, use the hydration reference or arithmetic guides. For a complete cooking method, choose one of the published recipe references and follow its ingredients, equipment and process together.

Sources & scope

Source-based explanation and editorial checklists by SourdoughStart, operated by Tag Ad Limited. AI-assisted article revised 2026-10-12. Source links are not endorsements.

Revision note: prepared for the new reference-led edition. Suggest a correction.

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