Hydration × flour

78% Hydration Organic Bread Flour

Noticeably open, shiny crumb. Irregular medium-to-large holes. Glossy cell walls. Moist texture.

Outside Organic Bread Flour's typical range (64–77%) — read below for handling

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Is 78% hydration right for Organic Bread Flour?

Organic Bread Flour's workable hydration range is 64–77%. Its absorption multiplier is 0.99× bread flour. 78% is above Organic Bread Flour's typical range. The dough will be slack and may not hold shape in a free-form hearth loaf. Either reduce hydration to 77%, or blend Organic Bread Flour (40–60%) with bread flour for structural support.

Absorption math for Organic Bread Flour at 78%

A recipe written for bread flour at 78% hydration, when substituted with 100% Organic Bread Flour, becomes 77% effective hydration (because Organic Bread Flour absorbs 1% less water). Same as conventional bread flour but allow 2-3% more proofing time (slightly weaker gluten on some batches). Autolyse 45-60 min. 3-4 stretch-and-folds.

Technique at 78% hydration

Upper range of 'standard' hearth hydration. Benefits from high-extraction flour which tolerates the hydration. Use coil folds instead of stretch-and-folds to build structure without deflating. Cold retard mandatory.

Worked water math for a 500 g batch

Organic Bread Flour ingredient weights for 500 g flour at 78% hydration
Organic Bread Flour500 g (100%)
Water390 g (78%)
Salt10 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 78% exactly.

What Organic Bread Flour gives you at 78%

At 78% hydration you can expect a very open, glossy, holey crumb — the signature of a high-hydration hearth loaf. A slack, sticky dough: work with wet hands, use coil folds rather than aggressive stretches, give a full bench rest after pre-shaping, and shape decisively — hesitation lets it spread.

Organic Bread Flour at 78% — FAQ

How much water do I use for Organic Bread Flour at 78% hydration?

Multiply the flour weight by 0.78. For a 500 g batch of Organic Bread Flour that's 390 g water, plus about 10 g salt (2%). Organic Bread Flour absorbs 0.99× as much water as white bread flour, so it behaves close to a straight bread-flour dough.

Is 78% hydration right for Organic Bread Flour?

78% is above Organic Bread Flour's usual 64–77% range — the dough will be slack and may spread. Reduce toward 77%, or blend Organic Bread Flour (40–60%) with bread flour for structure.

What crumb will Organic Bread Flour at 78% give me?

Expect a very open, glossy, holey crumb — the signature of a high-hydration hearth loaf. Noticeably open, shiny crumb. Irregular medium-to-large holes. Glossy cell walls. Moist texture.

Is Organic Bread Flour at 78% beginner-friendly?

This hydration is rated intermediate. A slack, sticky dough: work with wet hands, use coil folds rather than aggressive stretches, give a full bench rest after pre-shaping, and shape decisively — hesitation lets it spread.

Calculator pre-set to 78%

Weights below assume 100% Organic Bread Flour. For blends, use the main calculator on a recipe page.

Flour to add
450 g
Water to add
340 g
Salt
10 g
Levain @ 100%
100 g
Total dough
900 g
Effective hydration
78%
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.

Open 80% hydration guide →

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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  • Digital kitchen scale (0.1 g)Digital kitchen scale (0.1 g)

    Baker's percentage is by weight, not volume — a 0.1 g scale is what makes the math on this page accurate.

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  • Dutch oven / combo cookerDutch oven / combo cooker

    Traps steam for the first bake phase — the single biggest factor in oven spring and a blistered, glossy crust.

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  • Banneton proofing basketBanneton proofing basket

    Wicks moisture and holds shape during the final proof, so high-hydration dough doesn't spread flat.

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  • Bread lameBread lame

    A sharp lame scores clean ears — the cut that decides whether the loaf opens up or bursts at the side.

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  • Bench scraperBench scraper

    Steel scraper handles wet, sticky high-hydration dough without tearing the gluten you just built.

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  • High-protein bread flourHigh-protein bread flour

    The math assumes ~12–14% protein. Real bread flour absorbs the hydration you calculate — all-purpose won't.

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  • Danish dough whiskDanish dough whisk

    Mixes shaggy, high-hydration dough in seconds without the gluey mess of a spoon or your hands.

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Or learn the craft by ear

The numbers here are the what; a good baking book is the why. An Audible trial gets you any title free — Michael Pollan’s Cooked(the “Air” chapter is the best story ever told about why bread rises) is a perfect first listen.

Start a free Audible trial →

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Organic Bread Flour at every hydration level

Organic Bread Flour usually works between 64% and 77% 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.

Organic Bread Flour at each hydration level: water per 500 g of flour and how each level compares to its usual range.
HydrationWater per 500 gFor Organic Bread Flour
55%275 gDrier than usual
60%300 gDrier than usual
65%325 gIn its range
70%350 gIn its range
72%360 gIn its range
75%375 gIn its range
78%this page390 gWetter than usual
80%400 gWetter than usual
82%410 gWetter than usual
85%425 gWetter than usual
90%450 gWetter than usual
95%475 gWetter than usual

Sources: King Arthur Baking — Organic Bread Flour specs; Hamelman, Bread (3rd ed.); Robertson, Tartine Bread.