Pizza Dough Built from a Thickness Factor, Not from Guesswork
Most pizza recipes tell you what they make, not how much. "Makes four balls" is useless if your oven takes 30 cm pizzas and the writer's takes 25 cm ones, and it is worse than useless if you are feeding eight people and want twelve. The way out is to stop thinking in balls and start thinking in grams per square centimetre of finished pizza. That single number, multiplied by the area you intend to cover, gives the weight of dough the base needs.
The calculator above takes the number of pizzas, the diameter you want each one to be, a thickness factor, your hydration and salt percentages and your fermentation schedule. From those it returns the weight of a single ball, the total weight of the batch, and the full formula in flour, water, salt and yeast. Everything below explains where those numbers come from and which of them you can trust.
Why a 30 cm Pizza Wants Roughly 250 g of Dough
Start with the figure most Italian-style recipes assume: a 250 g ball stretched to about 30 cm. A 30 cm round covers π × 15² ≈ 707 cm², so that ball works out at roughly 0.35 g of dough for every square centimetre of pizza. That per-area figure is the thickness factor, and it is the only number that really describes how thick a base is. Once you have it, the arithmetic for any size is a multiplication: measure the diameter, work out the area, multiply by the factor.
The presets in the calculator are written for thinner American-style bases and run lighter than that Neapolitan ball — 0.105 g/cm² for a New York base, 0.09 for a cracker. That is a description of two different pizzas rather than an error in either. A Neapolitan base is left thick in the middle with a full, puffy rim, so it needs more dough per square centimetre than one stretched thin and even with a narrow rim. If you want a fat cornicione, treat the presets as the floor and scale up. Either way the ball weight is a starting point: dough relaxes as it rests, and a 250 g ball will not stretch to exactly the same circle twice.
The Four Thickness Presets
Ball weight is π × (diameter ÷ 2)² × thickness factor. The table below runs that calculation for the four presets at the three diameters that cover almost every home oven and pan. Areas are rounded to the nearest square centimetre and weights to the nearest gram. Change the factor by 0.01 and you change a 30 cm ball by about 7 g.
| Style & Factor | 25 cm (491 cm²) | 30 cm (707 cm²) | 35 cm (962 cm²) |
|---|---|---|---|
| Cracker / thin, 0.09 | 44 g | 64 g | 87 g |
| New York, 0.105 | 52 g | 74 g | 101 g |
| Hand-tossed, 0.12 | 59 g | 85 g | 115 g |
| Pan / deep-dish, 0.16 | 79 g | 113 g | 154 g |
Two consequences follow from the area term. First, weight grows with the square of the diameter, not in proportion to it: a 40 cm round covers about 1,257 cm², so at the same 0.105 factor it needs 132 g of dough — 1.78 times the 30 cm ball, not 1.33 times. Second, the size you measure has to be the size the dough actually covers. For a round pan, measure across the inside of the top edge, because sloping sides mean a 30 cm pan does not present 30 cm of floor to the dough. For a rectangle, multiply the interior length by the interior width: a 33 × 23 cm sheet pan takes 759 cm² of dough, a little more than a 30 cm round.
Reading the Batch Backwards as Baker's Percentages
Once you know the total weight of dough, the ingredients fall out of one division, because every ingredient is a percentage of the flour. Flour is 100%, water is the hydration percentage, salt and yeast are their own percentages, so the total dough weight equals flour × (1 + hydration ÷ 100 + salt ÷ 100 + yeast ÷ 100). Turn that around and flour = total dough ÷ that sum. Multiply the flour weight by each percentage and you have the batch.
Take four 30 cm New York bases: 4 × 74 g = 297 g of dough. At 62% hydration, 2.5% salt and 0.4% instant yeast, the divisor is 1 + 0.62 + 0.025 + 0.004 = 1.649, so flour = 297 ÷ 1.649 = 180 g. From there the water is 180 × 0.62 = 112 g, the salt is 180 × 0.025 = 4.5 g and the yeast is 180 × 0.004 = 0.72 g. Add the four back together and you get 297 g, which is the check that the arithmetic worked. Pizza doughs usually carry 2–3% salt, higher than the 1.8–2.2% window used for lean bread, because the salt is seasoning the sauce and cheese as well as the crumb.
Hydration for pizza is lower than for bread, deliberately. A cracker base handles best between 55% and 60%; New York and hand-tossed doughs usually sit at 60–65%; a pan dough can go to 68% or beyond because it is pressed into the tin rather than stretched in the air. Neapolitan dough is typically 62–65% on a fine 00 flour of 11–13% protein, whose fine grind and extensibility carry a wetter dough than an American bread flour would.
Why a Longer Cold Ferment Needs Less Yeast
Yeast quantity is a function of time and temperature, not a fixed part of the recipe. The bacteria and wild yeasts in a dough keep producing flavour compounds for hours, and a slow cold ferment gives them the time to do it while the cold holds the rise back. A dough that ferments in three hours at room temperature never develops those compounds, which is why a same-day dough tastes of flour and a 48-hour one tastes of the crust.
| Fermentation | Instant Yeast | Per 300 g Flour | What It Gives You |
|---|---|---|---|
| Room, 2–3 h | 0.6% | 1.8 g | Fast and reliable, little flavour |
| Room, 4–6 h | 0.4% | 1.2 g | Same day, some depth, easy timings |
| Room, 8–12 h | 0.2% | 0.6 g | Overnight on the counter, watch the heat |
| Fridge, 24 h | 0.1% | 0.3 g | Clear improvement in crust flavour |
| Fridge, 48 h | 0.06% | 0.18 g | The usual home sweet spot |
| Fridge, 72 h | 0.04% | 0.12 g | Tangy and extensible; weakens gluten |
Two practical warnings sit on top of that table. First, the small numbers are hard to weigh. A 0.06% rate on 300 g of flour is 0.18 g, which no ordinary kitchen scale will resolve; you need one that reads to 0.01 g, or you should dissolve the yeast in the water and weigh the solution instead. Second, if you use something other than instant dry yeast, convert: active dry is instant multiplied by 1.25, so 0.06% becomes 0.075%; fresh yeast is instant multiplied by 3, so the same rate becomes 0.18%. Hydration and the thickness factors on this page are reproducible. The yeast figure is the least predictable number here, because brand, age, how the jar was stored and the temperature of the dough all move it.
Turning a Three-Hour Recipe into a Two-Day One
The conversion keeps the dough identical and changes only two things: how much yeast goes in, and when. Mix the same flour, water and salt with the cold-ferment yeast rate, knead or fold until the dough is smooth, leave it covered on the counter for one to two hours until it has visibly started to swell, then move it to the fridge. Divide it into balls before it goes in, oiled and covered, so you are not pushing cold, tight dough around on baking day. Bring the balls out ninety minutes to two hours before you stretch them.
| Six 30 cm Bases at 0.12 | Room, 4 Hours | Fridge, 48 Hours |
|---|---|---|
| Ball weight | 85 g each | 85 g each |
| Total dough | 509 g | 509 g |
| Flour | 307 g | 307 g |
| Water at 63% | 194 g | 194 g |
| Salt at 2.5% | 7.7 g | 7.7 g |
| Instant yeast | 1.2 g (0.4%) | 0.18 g (0.06%) |
The two batches weigh the same and feel the same on the bench. The cold one is noticeably more relaxed when it comes out and stretches further without springing back, so shape it gently and give it a few minutes if it resists. It also browns faster, because the long ferment has converted some starch to sugar — if your two-day bases catch before the cheese melts, drop the oven 10–20 °C.
Shaping, and Why the Rim Is Not Rolled
A dough ball that has been shaped and rested is full of gas, and it is that gas, expanding in the first two minutes of the bake, that produces the puffy rim. Press the middle of the ball flat with your fingertips, leaving the outer two centimetres alone, then stretch from the centre outward with the back of your knuckles or across a floured bench. Rolling with a pin does the opposite: it presses the rim flat and squeezes the gas out of the whole base at once, and you get a flat, biscuity edge and a dense crumb.
The oven matters as much as the dough. A domestic oven tops out around 250–290 °C on its hottest setting, far below the 400–450 °C of a wood-fired dome, so the base needs a head start: a stone or steel plate preheated for 45–60 minutes lands the dough on a hot surface that sets it quickly instead of letting it dry out in the air. Steel conducts heat into the base faster than stone. Bake at your oven's maximum for six to eight minutes, turning once if your oven has a hot spot.
Frequently Asked Questions
Twelve inches is 30 cm, or 707 cm². At the cracker preset the calculator returns about 64 g per base, at New York 74 g, at hand-tossed 85 g and at pan 113 g. A Neapolitan-style 30 cm base made from a 250 g ball sits well above all four, because it is left thick in the middle with a full rim. Pick the style you intend to eat before you pick the number.
Because the yeast has more time to do the same work. A dough left in the fridge for 48 hours needs roughly a tenth of the yeast a four-hour room-temperature dough needs, or it exhausts the available sugars and collapses before you bake it. Cold also slows the yeast more than it slows the enzymes that build flavour, which is why a slow dough tastes deeper rather than simply rising less.
Yes. Active dry is instant multiplied by 1.25, and fresh yeast is instant multiplied by 3, so a 0.06% instant rate becomes 0.075% active dry or 0.18% fresh. Rehydrate active dry in a little of the recipe's water at 35–40 °C rather than stirring it in dry. Fresh yeast works well but needs using within a fortnight and keeping cold.
Forty-five to sixty minutes at your oven's maximum, with the stone or steel on a rack in the upper half. The point is not to warm a surface but to load the whole slab with heat, which takes far longer than the ten minutes an oven's indicator light suggests. A steel reaches temperature faster than a thick cordierite stone and holds more usable heat at the surface.
It is under-rested. Gluten that has been worked tight needs time for the strands to relax, and a ball straight from the fridge will fight you for ten or fifteen minutes. Cover it, leave it alone, then stretch again. If it happens every time regardless of resting, your flour is probably high in protein for the hydration you are using — raise the water by 2%.
Yes, and it works best with a dough that was going to be refrigerated anyway. Divide and ball it, oil the balls lightly, wrap them individually and freeze for up to two or three months. Thaw overnight in the fridge, then let them sit at room temperature for an hour or two before shaping. Freezing weakens the gluten slightly, so expect thawed dough to be softer and more extensible than fresh.