Hydration × flour
90% Hydration Light Rye Flour
Near-liquid dough territory. Extremely open, almost hollow crumb. Produces 'glass bread' effect.
⚠ Outside Light Rye Flour's typical range (68–80%) — read below for handling
Is 90% hydration right for Light Rye Flour?
Light Rye Flour's workable hydration range is 68–80%. Its absorption multiplier is 1.03× bread flour. 90% is above Light Rye Flour's typical range. The dough will be slack and may not hold shape in a free-form hearth loaf. Either reduce hydration to 80%, or blend Light Rye Flour (40–60%) with bread flour for structural support.
Absorption math for Light Rye Flour at 90%
A recipe written for bread flour at 90% hydration, when substituted with 100% Light Rye Flour, becomes 93% effective hydration (because Light Rye Flour absorbs 3% more water). Handles closer to wheat than medium or dark rye — light stretch-and-folds are fine at low percentages. Keep the bulk ferment a touch shorter than an all-wheat dough; rye enzymes speed fermentation. Above ~40% rye, switch to no-knead rye handling (mix, rest, wet hands, tight banneton).
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% Light Rye 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.