Your Oven Already Picked the Number
The steel has been at 500°F for a full hour. The dough ball weighs 255 g, it has been in the fridge since Tuesday, and when you press it out it keeps pulling back to nine inches. That is not a shaping problem. The formula was written for a 900°F oven.
Pizza is the one dough where the recipe cannot be separated from the equipment. A 65% dough baked in 70 seconds and the same 65% dough baked for 7 minutes are two different pizzas, and only one of them is worth eating. The percentage is a response to bake time.
63% is the number for a home oven on a steel at 500 to 550°F. Drop to 60% if your oven maxes out at 450°F, and go up to 70 to 75% only when the dough goes into an oiled pan instead of onto a peel.
Bake Time Is the Real Constraint
A Neapolitan pie spends 60 to 90 seconds in the fire. The base sets before the water in the middle has time to travel down and turn the center to soup. At 500°F, that same dough sits on the steel for six or seven minutes, which is five times as long for the water to migrate.
What goes wrong is not a soggy middle in the obvious sense. The rim is what fails first. A 70% dough puffs a big airy corniçione in 90 seconds because the oven traps and expands that steam in under a minute. In a seven-minute bake the steam escapes slowly, the rim dries into a hard shell before it finishes expanding, and you get a pale, crunchy ring around a flabby center.
| Setup | Temperature | Bake time | Hydration | Flour |
|---|---|---|---|---|
| Wood-fired (Ooni, Gozney, 12-inch) | 850–950°F | 60–90 sec | 58–62% | 00 |
| Gas grill with a stone | 600–650°F | 5–6 min | 60–63% | Bread flour |
| Home oven, steel, upper rack | 500–550°F | 6–7 min | 63–65% | Bread flour |
| Home oven, stone | 500°F | 8–10 min | 62–64% | Bread flour |
| Home oven, no stone, 450°F | 450°F | 12–14 min | 60–62% | Bread flour + 1% sugar |
| Detroit or sheet pan | 450–500°F | 12–15 min | 70–75% | Bread flour |
A gas grill with a stone hits 650°F, closer to a wood oven than your kitchen is, and a 60% dough there comes out with a leopard-spotted bottom in five minutes instead of seven.
From Percentage to Balls
Hydration is a ratio. The thing you actually shape is a weight, so start there. A thin-crust pie wants roughly 0.08 oz of dough per square inch of surface, and 0.09 oz if you like a chewier rim.
| Pie size | Surface area | At 0.08 oz/in² | At 0.09 oz/in² |
|---|---|---|---|
| 10 inch | 78 in² | 6.3 oz / 180 g | 7.1 oz / 200 g |
| 12 inch | 113 in² | 9.1 oz / 255 g | 10.2 oz / 285 g |
| 14 inch | 154 in² | 12.3 oz / 350 g | 13.9 oz / 390 g |
| 16 inch | 201 in² | 16.1 oz / 455 g | 18.1 oz / 510 g |
Four 12-inch pies is 1,020 g of dough. Divide that by the total percentage and you have your flour. At 65% with 2% salt and 0.5% instant yeast, the total is 167.5%, so 1,020 ÷ 1.675 = 609 g flour, 396 g water, 12 g salt, 3 g instant yeast.
That is the whole formula. The Dough Hydration Calculator runs the same division in either direction, from flour weight and target percentage to water, or from what you scooped to what you actually built.
A 255 g Ball at 70% Is Not the Same Pizza
Here is where most bakers go wrong. They read that high hydration makes a better crust, so they hold the ball weight and raise the water. Watch what that does to the flour.
| Hydration | Flour in a 255 g ball | Water | What it does at the peel |
|---|---|---|---|
| 60% | 157 g | 94 g | Stiff, springs back hard, easy to launch |
| 63% | 154 g | 97 g | Opens with a light press, holds a 12-inch round |
| 65% | 152 g | 99 g | Soft, needs a fast launch |
| 68% | 150 g | 102 g | Sticky, wants semolina under it |
| 70% | 148 g | 104 g | Slack, sags in the middle as you slide it off |
Nine grams of flour separates 60% from 70% in the same ball. That is a tablespoon, and it is also the difference between a pie that holds its shape on the peel and one that folds over the edge of the steel.
Now flip it. Keep 600 g of flour and change only the water.
| Hydration | Water | Total dough | Four balls |
|---|---|---|---|
| 62% | 372 g | 987 g | 247 g each |
| 65% | 390 g | 1,005 g | 251 g each |
| 68% | 408 g | 1,023 g | 256 g each |
The ball grows 9 g, which sounds harmless until you try to fit a 68% ball into a 12-inch round. It goes wider than the peel. If you want 65% and four pies, work back from the dough weight; if you want a wetter dough at a fixed ball weight, accept a smaller pie.
Flour Has to Match the Percentage
00 flour is milled finer and runs a W value around 260 to 280. It stretches beautifully and it is the correct choice at 900°F, where the pie is done before the gluten has time to think about it. Put that same 00 at 66% into a 500°F oven for seven minutes and the rim goes leathery.
Bread flour at 12.5 to 13% protein is the home-oven answer. It has enough elasticity to hold gas for six minutes. All-purpose at 10 to 11% will handle 62% on a steel, and it will fight you past 66%.
Two adjustments matter:
- Whole wheat or rye. Add 5 to 8 points of water for the same feel, and expect a faster brown. Half whole wheat at 68% handles like white at 63%.
- Oil and sugar. 1 to 2% olive oil softens the crumb and slows staling; above 3% the dough gets extensible enough to tear when you open it. 1% sugar helps browning at 500°F and does almost nothing at 900°F, where the crust colors in seconds.
Cold Ferment Raises the Effective Hydration
A 48-hour cold ferment changes how the same formula handles. Flour keeps absorbing water for hours after mixing, and by day two a 65% dough feels like the 67% version you made same-day. If your first cold-fermented pizza slid off the peel too fast, do not blame the percentage. Blame the calendar.
Yeast scales down as the clock stretches. Our yeast calculator puts pizza at 0.8% instant yeast for a standard same-day rise, 1.5% for a fast one, and 0.3% for a 24 to 72 hour cold ferment. At 609 g of flour, that is 1.8 g of instant yeast for the cold version and 4.9 g for same-day.
Take the balls out 60 to 90 minutes before you bake. A 40°F dough fights the press no matter what percentage it is, and the springback you feel is temperature, not gluten.
Opening: Bench Flour at 63%, Semolina Above 66%
At 63% a dusting of bench flour is all you need. The dough takes it, releases from the counter, and the excess brushes off before it reaches the steel.
Past 66% that stops working. Bench flour slides off a wet surface without sticking, so you add more, and the excess burns black on a 550°F steel within two minutes. Switch to semolina, or stretch on parchment and slide the sheet in for the first four minutes, then pull it and finish on the steel.
One more number worth knowing: dough temperature at opening should be 75 to 78°F. A cold ball at 55°F springs back like a 55% dough even when it is 65%.
Scaling to a Party
Ten pies means multiplying everything by 2.5, and salt is where hand math usually slips. The recipe servings calculator scales the whole card in one move.
If you build the dough with a levain instead of commercial yeast, that starter carries its own flour and water and both count toward the totals. A 100 g starter at 100% hydration is 50 g flour and 50 g water, so the flour line drops to 559 g and the water line to 346 g to keep the same 65%. The sourdough calculator does that subtraction for you, which matters more in pizza than in bread because the batch is small and 50 g is 8% of the flour.
Try Our Free Tools
The Dough Hydration Calculator converts between flour weight, water weight, and target percentage in both directions. The Yeast Calculator sizes instant, active dry, and fresh yeast for a same-day or cold-fermented pizza schedule. The Sourdough Calculator strips the starter’s flour and water out of the totals so a levain version lands on the same 63%. And when you are feeding eight people instead of two, the Recipe Servings Calculator doubles the formula without breaking the fractions.
Start at 63% for a home oven on a steel, 60% for a 450°F oven without one, and 58 to 62% only if you have fire. The exception is the pan: an oiled Detroit or sheet-pan pie wants 70 to 75%, because there the pan holds the shape the peel cannot.