Hydration × flour
90% Hydration Whole Wheat Flour
Near-liquid dough territory. Extremely open, almost hollow crumb. Produces 'glass bread' effect.
Outside Whole Wheat Flour's typical range (75–85%) — read below for handling
Is 90% hydration right for Whole Wheat Flour?
Whole Wheat Flour's workable hydration range is 75–85%. Its absorption multiplier is 1.075× bread flour. 90% is above Whole Wheat Flour's typical range. The dough will be slack and may not hold shape in a free-form hearth loaf. Either reduce hydration to 85%, or blend Whole Wheat Flour (40–60%) with bread flour for structural support.
Absorption math for Whole Wheat Flour at 90%
A recipe written for bread flour at 90% hydration, when substituted with 100% Whole Wheat Flour, becomes 97% effective hydration (because Whole Wheat Flour absorbs 7% more water). Extended autolyse (60-90 min) allows bran to fully hydrate and soften, improving gluten development. Warmer water (80-85°F) during autolyse accelerates this. Use at 15-30% of flour in blended doughs for flavor without overwhelming structure; use at 100% for true whole-grain loaves accepting denser crumb. Add 2% extra hydration beyond recipe baseline when substituting whole wheat.
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.
Worked water math for a 500 g batch
| Whole Wheat Flour | 500 g (100%) |
| Water | 450 g (90%) |
| 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 90% exactly.
What Whole Wheat Flour gives you at 90%
At 90% 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.
Whole Wheat Flour at 90% — FAQ
How much water do I use for Whole Wheat Flour at 90% hydration?
Multiply the flour weight by 0.9. For a 500 g batch of Whole Wheat Flour that's 450 g water, plus about 10 g salt (2%). Whole Wheat Flour absorbs 1.075× as much water as white bread flour, so it will feel a touch stiffer than the 90% number suggests.
Is 90% hydration right for Whole Wheat Flour?
90% is above Whole Wheat Flour's usual 75–85% range — the dough will be slack and may spread. Reduce toward 85%, or blend Whole Wheat Flour (40–60%) with bread flour for structure.
What crumb will Whole Wheat Flour at 90% give me?
Expect a very open, glossy, holey crumb — the signature of a high-hydration hearth loaf. Near-liquid dough territory. Extremely open, almost hollow crumb. Produces 'glass bread' effect.
Is Whole Wheat Flour at 90% beginner-friendly?
This hydration is rated expert. 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 90%
Weights below assume 100% Whole Wheat 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.
To bake this recipe you need
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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.
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Whole Wheat Flour at every hydration level
Whole Wheat Flour usually works between 75% and 85% 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 Whole Wheat Flour |
|---|---|---|
| 55% | 275 g | Drier than usual |
| 60% | 300 g | Drier than usual |
| 65% | 325 g | Drier than usual |
| 70% | 350 g | Drier than usual |
| 72% | 360 g | Drier than usual |
| 75% | 375 g | In its range |
| 78% | 390 g | In its range |
| 80% | 400 g | In its range |
| 82% | 410 g | In its range |
| 85% | 425 g | In its range |
| 90%this page | 450 g | Wetter than usual |
| 95% | 475 g | Wetter than usual |