What 70 Percent Hydration Means in the Bowl
A recipe card says 70% hydration and lists 500 g of flour. The water that goes with it is 350 g, which is 350 mL, or 1½ cups less two teaspoons. Tap water is the one ingredient where the scale and the cup agree, so you can pour from a liquid measuring cup and still be right.
Add 10 g of salt and 2.5 g of instant yeast and the bowl holds 862 g of dough. That is one 9x5 inch pan loaf with a little extra for a single roll.
The arithmetic is one line: water = flour × 0.70. The Dough Hydration Calculator runs it in either direction and prints a band label with the result. At 70% the label reads Medium Hydration, “soft, slightly sticky dough,” best for white bread and pizza dough.
All of that is correct. It also tells you almost nothing about what happens when your hand goes into the bowl.
| Flour | Water at 70% | Total dough with 2% salt |
|---|---|---|
| 350 g | 245 g | 603 g |
| 500 g | 350 g | 860 g |
| 750 g | 525 g | 1,290 g |
| 1,000 g | 700 g | 1,700 g |
| 1,500 g | 1,050 g | 2,550 g |
Why 70 Percent Is the Line People Notice
Our calculator changes its label at 72. A dough at 70.0% comes back Medium. The same dough at 72.5% comes back High Hydration, wet and sticky, artisan bread and ciabatta. The difference between those two answers is 12.5 g of water on a 500 g batch. Half a tablespoon.
Two percent of water moves the advice from “shape it on a floured bench” to “use folds and a bench scraper.” That is why 70% sits in so many arguments. It is the last number that still handles like bread, and it is close enough to 72 that a sloppy cup measurement tips it over.
Here is how easily that happens. Our charts weigh all-purpose flour at 120 g per cup. Four level cups is 480 g, not 500. Pour the 350 g of water a 70% recipe calls for into that 480 g and you have 72.9%, which crosses the boundary and lands in the wet band. Same scooping, same water, different dough.
What 70 Percent Feels Like, Stage by Stage
A 70% dough is not hard to handle. It is hard to handle early, and then it becomes easy in a way that surprises people who only bake at 60%.
| Stage | Clock | What you see | What to do |
|---|---|---|---|
| Mix | 0–3 min | shaggy mass, dry flour at the bottom of the bowl | stir until no dry flour remains, cover |
| Rest | 20–30 min | smoother, less tacky, stretches an inch without tearing | add the salt, squeeze it through |
| First fold | 1 h | slack, creeping toward the bowl edge | wet your hand, lift one side, fold it over |
| Fourth fold | 2 h | holds a dome, pulls a thin translucent window | stop folding |
| End of bulk | 2.5 h at 75°F | 60–70% larger, bubbles along the rim | turn out and preshape |
The jump between the first row and the last is the part no percentage explains. Water that starts as a puddle on the counter becomes structure, and it does that on a timer you cannot shorten by kneading harder.
Mixing It Without a Fight
Four habits make a 70% batch behave.
- Hold back 25 g of the water. Mix with 325 g, then add the last 25 g during the second fold once the gluten has started to organize. You get the same final hydration with a dough that does not slide around the bowl for the first ten minutes.
- Rest before you salt. Twenty minutes of flour and water alone lets the flour hydrate fully. Salt added at the start tightens the gluten and slows that absorption. The salt still goes in, just not first.
- Check the water temperature. For a 76°F dough with flour at 70°F and a kitchen at 72°F, hand mixing needs water at 86°F: (3 × 76) − 70 − 72. Warm to the wrist, not hot. A 70% dough fermented too warm goes slack before it goes tall.
- Use a wet hand, not flour. Flour added at the mixing stage changes the hydration you just calculated. Water on your hand does not.
Shaping a Dough This Wet
Turn the dough onto an unfloured counter and preshape it into a loose round. Let it sit 20 minutes. The surface tightens, the gluten relaxes, and the round stops spreading the moment you leave it alone.
Flour the bench, not the dough. A dusted bench lets the dough grip and build tension as you drag it toward you. A dusted dough just slides.
For a pan loaf, shape into a log and drop it into a buttered 9x5 pan. 862 g of dough is right at the top of what that pan holds comfortably, so expect the loaf to crown above the rim before it goes in the oven. For a free-form boule, shape with tension and proof seam-side up in a floured towel or banneton, then retarding it 12 to 16 hours at 38°F firms the surface enough to score cleanly.
Why a 70 Percent Loaf Comes Out Gummy at 350°F
This is the most common complaint about the percentage, and the percentage is not the cause. The oven setting is.
| Oven | Time | What happens |
|---|---|---|
| 350°F, pan, no steam | 55–60 min | crust sets before the loaf springs, spreads wide, gummy band an inch above the base |
| 425°F, pan | 40–45 min | some spring, tight crumb, crust pale |
| 450°F for 20 min, then 425°F for 20–25 | 40–45 min total | open crumb, dark crust, internal 205–210°F |
At 350°F a 70% dough spends its first 25 minutes spreading instead of rising, because the crust sets slowly while the water keeps the interior fluid. By the time the center reaches temperature, the shape is already decided and the crumb near the bottom never opens.
Pull the loaf at 205–210°F in the center, then leave it alone for two hours. Carryover takes it up another 5°F, and cutting at 30 minutes releases steam that condenses back into the crumb as the exact gumminess you were trying to avoid. A serrated knife on a hot loaf compresses the structure rather than slicing it.
When 70 Percent Is the Wrong Number
The percentage describes water against flour. It does not know what kind of flour you used.
- Whole wheat absorbs 5 to 10 points more water than white flour before it feels the same. A 70% whole wheat dough handles like a 62% white one, so most bakers mix it at 75 to 80% and still call it a 70% dough by feel.
- Rye takes more again, and it never develops the same gluten, so the number matters less than the pan.
- Bread flour at 12.7% protein drinks more than all-purpose at 11.7%. Same weight, different dough.
- Pizza is where the label misleads. Traditional Neapolitan pizza is mixed near 59%, not 70. A 70% pizza dough is a pan pizza or a Detroit-style dough, and it is pressed into the pan rather than stretched.
- Enriched doughs read low on the calculator and behave high, because butter and egg yolk coat the flour and keep water away from the gluten.
If your dough is already mixed and reading wrong, the fix is small and slow. Add flour a tablespoon at a time, 8 to 9 g each, and rest 15 minutes between additions. Going from 72% back to 70% on a 500 g batch takes about 15 g of flour, less than two tablespoons.
For yeast quantities at your dough weight and rise schedule, the Yeast Calculator returns grams of instant, active dry, or fresh. If you are building the batch from a starter instead, the Sourdough Calculator subtracts the starter’s flour and water from the totals so the percentage stays honest.
Try Our Free Tools
The Dough Hydration Calculator works both ways: flour and water in for a percentage, or flour and a target in for the water you need in grams, ounces, pounds, or milliliters. The Yeast Calculator sizes the leavening to your dough weight and schedule, and the Recipe Servings Calculator rescales everything when you want two loaves instead of one. Free, instant, no signup.
70% hydration is 350 g of water for 500 g of flour, and it is the last percentage that still handles like bread dough instead of batter. The exception is any flour that is not white wheat: whole wheat and rye want 5 to 10 points more water to reach the same feel, and a 70% number written for all-purpose will leave those doughs stiff.