Hydration × flour
82% Hydration Dark Rye Flour (Pumpernickel)
Classic ciabatta crumb — very irregular large holes, glossy interior, thin crackling crust. Maximum open-crumb for hearth shapes.
⚠ Outside Dark Rye Flour (Pumpernickel)'s typical range (90–110%) — read below for handling
Is 82% hydration right for Dark Rye Flour (Pumpernickel)?
Dark Rye Flour (Pumpernickel)'s workable hydration range is 90–110%. Its absorption multiplier is 1.1× bread flour. 82% is below Dark Rye Flour (Pumpernickel)'s typical range. The dough will be stiff and hard to fully develop. Consider moving up to 90% for better extensibility.
Absorption math for Dark Rye Flour (Pumpernickel) at 82%
A recipe written for bread flour at 82% hydration, when substituted with 100% Dark Rye Flour (Pumpernickel), becomes 90% effective hydration (because Dark Rye Flour (Pumpernickel) absorbs 10% more water). Dark rye requires very wet, paste-like dough. Scald (mix flour with boiling water) for 24 hours as pre-ferment to maximize water absorption. Pan loaves only — dough is too wet to freestand. Long, slow bake at 325-350°F for 4+ hours for traditional pumpernickel character.
Technique at 82% hydration
Dough is nearly batter-like. Hand-stretch on heavily floured surface; cut into rectangles with bench scraper. No shaping, no slashing. Bake on stone with initial steam.
Calculator pre-set to 82%
Weights below assume 100% Dark Rye Flour (Pumpernickel). For blends, use the main calculator on a recipe page.
- Flour to add
- 450 g
- Water to add
- 360 g
- Salt
- 10 g
- Levain @ 100%
- 100 g
- Total dough
- 920 g
- Effective hydration
- 82%
How the math works
Total water = flour × hydration %. Your levain contributes 50 g flour + 50 g water — both count toward the totals. You add only the remainder as fresh flour and water.
Salt % is computed on total flour weight, not final-dough flour.