Hydration × flour
85% Hydration Light Rye Flour
Extremely open, irregular, moist crumb. Large glossy holes dominate. Very thin, crackling crust.
Outside Light Rye Flour's typical range (68–80%) — read below for handling
Is 85% hydration right for Light Rye Flour?
Light Rye Flour's workable hydration range is 68–80%. Its absorption multiplier is 1.03× bread flour. 85% 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 85%
A recipe written for bread flour at 85% hydration, when substituted with 100% Light Rye Flour, becomes 88% 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 85% hydration
Pan-baked or stretched on floured surface — not bannetoned or shaped. Requires high-protein bread flour (or rye's pentosan structure). Advanced technique territory.
Worked water math for a 500 g batch
| Light Rye Flour | 500 g (100%) |
| Water | 425 g (85%) |
| Salt | 10 g (2%) |
Add your levain on top of these weights; the calculator below subtracts the flour and water it already contributes so the bench numbers land at 85% exactly.
What Light Rye Flour gives you at 85%
At 85% hydration you can expect a very open, glossy, holey crumb — the signature of a high-hydration hearth loaf. A very wet dough: minimal handling wins. Use wet hands and a bench scraper, coil or stitch folds only, a strong pre-shape, and a well-floured couche or banneton — this hydration rewards a light, confident touch and punishes over-working.
Light Rye Flour at 85% — FAQ
How much water do I use for Light Rye Flour at 85% hydration?
Multiply the flour weight by 0.85. For a 500 g batch of Light Rye Flour that's 425 g water, plus about 10 g salt (2%). Light Rye Flour absorbs 1.03× as much water as white bread flour, so it will feel a touch stiffer than the 85% number suggests.
Is 85% hydration right for Light Rye Flour?
85% is above Light Rye Flour's usual 68–80% range — the dough will be slack and may spread. Reduce toward 80%, or blend Light Rye Flour (40–60%) with bread flour for structure.
What crumb will Light Rye Flour at 85% give me?
Expect a very open, glossy, holey crumb — the signature of a high-hydration hearth loaf. Extremely open, irregular, moist crumb. Large glossy holes dominate. Very thin, crackling crust.
Is Light Rye Flour at 85% beginner-friendly?
This hydration is rated advanced. A very wet dough: minimal handling wins. Use wet hands and a bench scraper, coil or stitch folds only, a strong pre-shape, and a well-floured couche or banneton — this hydration rewards a light, confident touch and punishes over-working.
Calculator pre-set to 85%
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
- 375 g
- Salt
- 10 g
- Levain @ 100%
- 100 g
- Total dough
- 935 g
- Effective hydration
- 85%
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.
To bake this recipe you need
Amazon links. We earn from qualifying purchases.
The gear that makes the math work
A short, honest baking kit. The scale matters most — every weight on this page is in grams. The Dutch oven is what turns a good crumb into a great crust.
Affiliate links. As an Amazon Associate, SourdoughHydration earns from qualifying purchases at no extra cost to you.
Digital kitchen scale (0.1 g)View on Amazon →- Dutch oven / combo cookerView on Amazon →
- Banneton proofing basketView on Amazon →
- Bread lameView on Amazon →
- Bench scraperView on Amazon →
- High-protein bread flourView on Amazon →
- Danish dough whiskView on Amazon →
As an Amazon Associate, SourdoughHydration earns from qualifying purchases at no extra cost to you. More on how this is funded.
Light Rye Flour at every hydration level
Light Rye Flour usually works between 68% and 80% hydration — drier gives a stiffer dough, wetter a slacker one. Tap a level for the technique, the absorption math and a calculator set to it.
| Hydration | Water per 500 g | For Light Rye Flour |
|---|---|---|
| 55% | 275 g | Drier than usual |
| 60% | 300 g | Drier than usual |
| 65% | 325 g | Drier than usual |
| 70% | 350 g | In its range |
| 72% | 360 g | In its range |
| 75% | 375 g | In its range |
| 78% | 390 g | In its range |
| 80% | 400 g | In its range |
| 82% | 410 g | Wetter than usual |
| 85%this page | 425 g | Wetter than usual |
| 90% | 450 g | Wetter than usual |
| 95% | 475 g | Wetter than usual |