The bench baker is trying to replicate a ciabatta recipe from a book that doesn't specify hydration. They know the flour is 600g and the water is 468g. Before mixing the next batch, they need to confirm the hydration percentage and whether any adjustment is needed to hit the target open crumb.
Hydration % = (Water ÷ Flour) × 100
Low hydration (55–65%): stiff, easy to shape — bagels, pretzels. Medium (65–72%): standard bread. High (72–80%): open crumb, sticky — ciabatta. Very high (80%+): wet dough requiring folds rather than kneading.
1 What this calculator does
Calculates dough hydration percentage from flour and water weights. Classifies the dough type and describes the expected texture and handling requirements. Shows target water amounts for common hydration levels as a reference.
2 Formula & professional reasoning
Hydration% = Water weight / Flour weight x 100
Hydration classifications:
<57%: Very stiff (bagels, pretzels -- dense chewy)
57-65%: Stiff (sandwich bread, rolls -- tight crumb)
65-72%: Medium (standard bread, pizza -- versatile)
72-80%: High (ciabatta, focaccia -- open airy crumb)
80%+: Very high (sourdough, baguettes -- requires skill)
Hydration is the single most important variable in determining dough workability and final bread texture. Higher hydration means more water competing with gluten for the flour proteins, resulting in a weaker, stickier dough that ferments faster and produces a more open, irregular crumb. The Q10 rule applies to fermentation -- higher hydration also accelerates enzyme and yeast activity, so hydration affects both texture and timing. Adjusting hydration is the key tool for matching a target crumb structure.
3 Worked examples
⚠️ Illustrative example only — not clinical or professional instruction.
Hydration: 468/600 x 100 = 78.0% | Total dough: 600+468 = 1,068gCurrent: 480/800 x 100 = 60.0% | Target water: 800 x 0.70 = 560g | Adjustment needed: 560-480 = +80g waterNeapolitan (900C wood-fired, thin): 58% = tight dough, good char | NY (deck oven, hand-toss): 63% = workable, chewy | Roman (pan, focaccia-style): 70% = soft, open4 Sanity check
5 Common errors
| Error | Cause | Consequence | Fix |
|---|---|---|---|
| Adding more flour to fix a sticky high-hydration dough | Treating stickiness as a problem to fix rather than an expected property of high-hydration dough | Hydration drops, crumb closes up, final loaf is denser than intended | High hydration dough is supposed to be sticky. Use wet hands, bench scraper and stretch-and-fold technique instead of adding flour. The gluten will develop strength through folding during fermentation without changing the hydration. |
| Not accounting for flour type when expecting a specific hydration behaviour | Using whole wheat or rye flour without adjusting the water | Dough feels much stiffer than expected because these flours absorb more water | Wholemeal and rye flour absorb approximately 5-10% more water than white flour. If substituting 30% wholemeal for white flour, increase water by 1-2% of flour weight to maintain the same dough consistency. |
| Calculating hydration from total recipe weight instead of flour weight | Not understanding that hydration is a baker's percentage relative to flour | Hydration percentage understated -- the ratio seems lower than the dough feels | Hydration = (water / flour) x 100. Not (water / total dough) x 100. For a 70% hydration dough: water is 70% of the flour weight, not 70% of the total dough weight. |
| Using tap water temperature without adjusting for warm or cold days | Not accounting for water temperature effect on dough temperature | Dough temperature outside the ideal 23-26C range -- inconsistent fermentation | The desired dough temperature (DDT) after mixing is typically 23-26C. Adjust water temperature to compensate for flour temperature and ambient temperature: Water temp = (DDT x 3) - Flour temp - Ambient temp - Friction factor. |
6 Reference & regulatory links
7 Professional workflow
Common tools used alongside this one: