How to Choose Sourdough Hydration

Why hydration matters

Higher hydration produces more open crumb with larger, irregular alveoli; lower hydration produces tight, even crumb. Higher also means wetter dough — harder to handle, more technique-dependent, more prone to spreading flat if under-structured. The craft of picking hydration is matching your ambition (crumb) with your capability (handling) and your ingredients (flour strength).

Start from the style you want

Every canonical style has a historical hydration target. Bagels and pretzels sit at 55-62% — tight crumb is the point. Baguettes and country loaves anchor 68-75% — the balanced open crumb zone. Ciabatta and focaccia push 78-85% for dramatic airiness. Pan de cristal goes to 90%+ and is an advanced project. Pick the style first; the hydration range falls out.

Adjust for flour type

Bread flour is the baseline — recipes are written for it. Whole wheat absorbs 7.5% more water, so add 5-8% to hydration. Rye absorbs 8-10% more. Spelt and emmer absorb less — subtract 3-5%. Einkorn absorbs 12% less — subtract 10-15%. If you're substituting flours, our flour pages list the exact absorption multiplier and adjusted hydration.

Adjust for skill level

Beginners should start at the low end of the style range. A first country loaf at 70% is easier to handle and shape than at 75%. An intermediate baker can hit the recipe target. Advanced bakers push the upper end of the range and compensate with slap-and-fold, coil folds, and overnight cold retard. Skill and hydration scale together.

Decision framework

Four questions in order. What style do you want? (sets base range). What flour are you using? (adjusts the base). What's your skill level? (places you low/middle/high in the adjusted range). What oven/vessel do you have? (dutch oven tolerates higher hydration than stone; stone tolerates higher than sheet pan). This four-step decision beats 'copy a random recipe off the internet' by a wide margin.

When to change after the first bake

Dough spread flat and didn't hold shape? Reduce hydration 3-5% next bake. Crumb is dense and tight? Increase 3-5%. Crumb has a gummy layer near the bottom? Could be under-hydrated (not enough moisture to bake through) or under-baked (pulled too early) — test with the thermometer (210°F for lean doughs). Never change more than one variable at a time, otherwise you can't tell which change fixed what.

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