What's the difference between Whole Wheat Flour and High-Extraction Flour?

Whole Wheat Flour: 13.00-14.00% protein, absorption 1.075×, hydration 75-85%. High-Extraction Flour: 12.00-13.50% protein, absorption 1.030×, hydration 72-82%.

Can I substitute Whole Wheat Flour for High-Extraction Flour 1:1?

Not directly. Absorption differs by 4.4%, so Whole Wheat Flour needs more water. Adjust hydration by 4% when substituting.

Which is better for open-crumb sourdough?

Whole Wheat Flour supports higher hydration (up to 85%), making it better suited to open-crumb hearth loaves than High-Extraction Flour (max 82%).

Side-by-side comparison

Whole Wheat Flour vs High-Extraction Flour

	Whole Wheat Flour	High-Extraction Flour
Protein	13.00–14.00%	12.00–13.50%
Absorption (× bread flour)	1.075	1.030
Hydration range	75–85%	72–82%
Category	whole-wheat	high-extraction
Ash %	1.60	1.10

Whole Wheat Flour

Whole wheat flour contains the entire wheat kernel — bran, germ, and endosperm. Bran absorbs ~7.5% more water than refined flour, and the sharp bran particles cut through gluten strands, reducing effective gluten structure. Protein is higher by weight (13-14%) but functional gluten is lower. Result: whole wheat needs higher hydration (typically 80%+) and produces a denser, more flavorful crumb. WSU Bread Lab research shows hard red winter wheat varieties (Yecora Rojo, Warthog) mill into premium whole wheat for sourdough. King Arthur's Traditional Whole Wheat is a reliable reference.

High-Extraction Flour

High-extraction flour (also called 'T85' in French classification or 'sifted whole wheat' colloquially) contains 80-90% of the wheat kernel — more of the bran and germ than refined bread flour (which extracts ~72%), but less than whole wheat (100%). The result is flavor complexity approaching whole wheat with handling properties closer to bread flour. Absorption is 3% above bread flour. Central Milling's Artisan Bakers Craft Plus and Bob's Red Mill Artisan Bread Flour are references. Chad Robertson's Tartine Country Loaf historically used high-extraction at 80% + whole wheat at 10% + bread flour at 10% for its signature flavor profile.

Substitution math

When substituting Whole Wheat Flour for High-Extraction Flour in a recipe, adjust hydration by about 4% — add more water because Whole Wheat Flour absorbs more than High-Extraction Flour.

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.

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 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 basket
Wicks moisture and holds shape during the final proof, so high-hydration dough doesn't spread flat.
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Bread lame + bench scraper
A sharp lame scores clean ears; a steel bench scraper handles wet, sticky dough without tearing the gluten.
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High-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 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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Gear guides — what actually matters