Hydration guide

Vital Wheat Gluten Hydration Guide

Workable range: 0–0% · Absorption: 1.600× bread flour · Midpoint target: 0%

How Vital Wheat Gluten behaves at each hydration

Vital wheat gluten (VWG) is extracted gluten protein — 75-80% protein by weight — used as a flour additive to boost gluten strength. Not a standalone flour. Typically added at 1-3% of total flour weight to increase strength when working with lower-protein flours (AP, ancient grains) or high percentages of whole grain. Bob's Red Mill is the standard US supplier. Extremely hygroscopic — absorbs 1.6x its weight in water.

Substituting Vital Wheat Gluten for bread flour

Absorption multiplier: 1.600×. When substituting for bread flour, add about 60% more water. For example: a 75% bread-flour recipe becomes 120% when using 100% Vital Wheat Gluten.

The calculator below is pre-set to 0%. Adjust the slider to match your target. Salt and levain percentages are the flour-independent defaults (2.0% and 20%).

Technique at target hydration

Not used as a flour. Add 1-3% of total flour weight to boost gluten in AP-heavy or whole-grain-heavy doughs. For example: 2% VWG added to 100% whole wheat dough rescues oven spring. Increase hydration by ~1% per 1% VWG added. Hydrate VWG with the main dough water to avoid clumping.

Calculator pre-set to 0%

Flour to add
450 g
Water to add
-50 g
Salt
10 g
Levain @ 100%
100 g
Total dough
510 g
Effective hydration
0%
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 55% hydration guide →

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