How to Choose Sourdough Hydration: 65%, 75%, or 85%?

10 min read - Updated August 2026

By SourdoughCalc Team

Hydration is the single dial that controls your sourdough. Turn it to 65% and you get a tight, chewy crumb that holds its shape. Turn it to 85% and you get an open, holey crumb that tastes brighter but fights you at every step. Most recipes pick one number and stop there - this guide picks three and tells you exactly when each one is the right choice.

Already know what hydration is? Skip ahead to our quick decision guide. New to the concept? Start with our complete hydration guide, then come back. For the full 50% to 100% range, see our hydration chart.

The Short Answer

If you do not want to read the whole article, here is the rule: match hydration to the bread you want, not to the technique you prefer.

• Want a baguette, bagel, or pretzel? Use 60-65%.
• Want everyday sandwich or boule? Use 70-78%.
• Want ciabatta, focaccia, or open-crumb artisan? Use 80-90%.

That is the entire decision in three lines. The rest of this article explains why those numbers matter and how to switch between them.

The Three Hydration Tiers

Every sourdough recipe falls into one of three tiers. Each tier trades off against the others in four dimensions: crust, crumb, handling, and best use case.

Low Hydration (60-70%): When and Why

Low-hydration doughs sit in the 60-70% range, with 65% being the most common value. A 65% dough means 325g of water for every 500g of flour - firm, shapeable, and forgiving.

The lower water content serves three purposes. First, the dough holds its shape during long proofing - critical for elongated breads like baguettes that need to keep their scored ridges. Second, the crumb comes out tighter and chewier, which is what you want for bagels, pretzels, and rustic Italian breads. Third, the dough is dramatically easier to handle, which is why beginners often start here.

When to use low hydration: any bread that needs to hold a shape (baguettes, batards, rolls, stuffed breads) or that benefits from a tight, chewy crumb (bagels, pretzels, English muffins).

Trade-off: less open crumb, less surface area for flavor development, and a shorter window of peak fermentation. The flavor will still be excellent but will lean toward nutty and mild rather than bright and tangy.

Standard Hydration (70-78%): The Default

The 70-78% range is where most published sourdough recipes live, and for good reason. 75% is the sweet spot: wet enough to produce an open, artisan-style crumb, dry enough that a confident beginner can shape it without it spreading across the counter.

Standard hydration gives you the best of both worlds. The crumb is open enough to be visually impressive but tight enough to slice cleanly for sandwiches. The crust develops that signature crackle. The dough is sticky at first but releases with proper technique (wet hands, bench scraper, light dusting of flour). And the long bulk fermentation produces the complex, tangy flavor that sourdough is famous for.

When to use standard hydration: everyday sourdough loaves, boule and batard shapes, sandwich bread, pain de campagne, and most "first sourdough loaf" recipes.

Trade-off: nothing dramatic. This is the safe, reliable choice for almost any sourdough application. If you are unsure which hydration to use, start here.

High Hydration (80-90%): When It Shines

High-hydration doughs - 85% is the common target - produce the most striking sourdough you can bake. The crumb is open and irregular, with large holes that look straight out of an artisan bakery window. The crust caramelizes deeper, and the flavor is brighter because the longer bulk fermentation gives wild yeast more time to work.

The catch: every step is harder. The dough sticks to everything - your hands, the counter, the bench scraper, the banneton. Shaping requires a confident hand and often the stretch-and-fold technique instead of traditional rounding. Bulk fermentation takes 30-60% longer. And you need stronger flour (12%+ protein) to give the gluten network enough structure to hold all that water.

When to use high hydration: Italian breads like focaccia and ciabatta, open-crumb artisan boules, and any bread where dramatic visual crumb matters more than ease of handling.

Trade-off: longer time investment, higher skill floor, and more variables that can go wrong. New bakers often try 85% as a "stretch goal" before they have a solid 75% technique, and end up frustrated.

How to Switch Between Hydrations

Adjusting hydration is not as simple as just adding water. Every change in hydration cascades through your whole process. Here is the rule that makes it work:

Every +5% hydration = +30 min bulk fermentation + 1 extra stretch-and-fold

Going from 75% to 85%? Plan on adding 60 minutes to your bulk and doing 2 extra folds during the first 90 minutes. Going down from 75% to 65%? Reduce bulk by 30 minutes and skip a fold.

Other adjustments that travel with hydration:

• Flour strength: higher hydration needs stronger flour. 12-13% protein minimum for 80%+.
• Salt: 1.8-2.0% for standard, lean toward 2.0-2.2% for very wet doughs to tighten the structure.
• Shaping technique: wet doughs need stretch-and-fold tension, not rounding. See our shaping guide.
• Banneton prep: rice flour + a light dust is not optional for high hydration - it prevents sticking.

Common Mistakes at Each Hydration

Hydration-specific mistakes are predictable. Once you know what each tier is most likely to do wrong, you can prevent it.

Low Hydration (60-65%) Pitfalls

1. Too dry, ends up like a brick. If your dough feels like clay and tears when you try to shape it, you went below 60% or your flour is absorbing more than expected. Add water 10g at a time until the dough comes together smoothly.

2. Insufficient gluten development. Low hydration masks weak gluten. Even a 65% dough needs proper stretch-and-folds - skipping them produces a tight, dense crumb that tastes under-fermented.

3. Over-baking to compensate. Dense crumb does not mean it needs more time in the oven. Pull it at 210F internal for a tender, not tough, finish.

Standard Hydration (75%) Pitfalls

1. Treating 75% as "high hydration." It is not. 75% is moderate. If you are struggling with shaping at 75%, the issue is technique or flour strength, not the water content.

2. Under-fermenting the bulk. 75% doughs need a fully developed bulk - look for 50-75% rise, domed top, and bubbles along the sides before shaping.

3. Skipping the autolyse. A 30-minute autolyse (flour + water only, no salt or starter) makes 75% doughs dramatically easier to shape. It is the single highest-leverage step for standard hydration.

High Hydration (85%+) Pitfalls

1. Shaping too early. High-hydration dough needs full gluten development before shaping - usually 4+ stretch-and-folds over 2 hours. Rush it and the dough collapses.

2. Using all-purpose flour. AP flour at 85% hydration is a guaranteed disaster. Use bread flour with at least 12% protein, or even better, a blend with 10-20% whole wheat or rye for extra structure.

3. Cold proof too long. High-hydration doughs over-ferment faster in the fridge because the extra water accelerates yeast activity. Reduce cold proof by 2-4 hours compared to a 75% recipe.

Quick Decision Guide

Stop guessing. Answer these four questions and the right hydration falls out.

That is it. Four questions, one number. Once you have a target, dial it in with our free hydration calculator and you are ready to mix.

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