Hydration × flour
90% Hydration High-Extraction Flour
Near-liquid dough territory. Extremely open, almost hollow crumb. Produces 'glass bread' effect.
⚠ Outside High-Extraction Flour's typical range (72–82%) — read below for handling
Is 90% hydration right for High-Extraction Flour?
High-Extraction Flour's workable hydration range is 72–82%. Its absorption multiplier is 1.03× bread flour. 90% is above High-Extraction Flour's typical range. The dough will be slack and may not hold shape in a free-form hearth loaf. Either reduce hydration to 82%, or blend High-Extraction Flour (40–60%) with bread flour for structural support.
Absorption math for High-Extraction Flour at 90%
A recipe written for bread flour at 90% hydration, when substituted with 100% High-Extraction Flour, becomes 93% effective hydration (because High-Extraction Flour absorbs 3% more water). Autolyse 45-60 min. 3-4 stretch-and-folds. Supports 78-80% hydration reliably. Excellent base for country-loaf-style hearth breads.
Technique at 90% hydration
Dough handling requires constant wet hands, bench scrapers, and oiled surfaces. Include 5% olive oil for lubrication. Pan-baked only. Expert-level technique.
Calculator pre-set to 90%
Weights below assume 100% High-Extraction Flour. For blends, use the main calculator on a recipe page.
- Flour to add
- 450 g
- Water to add
- 400 g
- Salt
- 10 g
- Levain @ 100%
- 100 g
- Total dough
- 960 g
- Effective hydration
- 90%
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.