Great pizza starts with dough, and dough starts with numbers. Too little flour and you run out halfway through shaping; too much water and the dough sticks to everything, including your hands. Home cooks often follow a recipe for four pizzas when they need six, and then guess the scaling, which is how a good dough turns into a sticky mess. This calculator scales properly: enter your pizza count, ball weight and hydration, and it gives flour, water, salt and yeast for the whole batch. It also helps when friends join at the last minute, because adding two pizzas is a new calculation, not a guess in the middle of mixing.
The key idea is the dough ball. A typical home pizza uses a 250 gram ball, which makes a pizza about 30 centimetres across with a thin centre and a puffy edge. Smaller balls make smaller pizzas, larger balls make larger ones, and the total dough is simply the ball weight times the number of pizzas. Four pizzas at 250 grams need 1,000 grams of dough in total. The calculator then splits that total into its ingredients using the hydration and the salt and yeast percentages.
Hydration is water as a percentage of flour, and it shapes the dough more than any other number. At 60 percent hydration the dough is firm and easy to shape, which suits beginners and a hot home oven. At 65 percent it is softer and more open, the standard for many Neapolitan-style home recipes. At 70 percent it is soft and airy but sticky, and it needs confident handling and a good stretch technique. Choose lower hydration until shaping feels easy, then work upwards.
Here is a worked example. Four pizzas at 250 grams each need 1,000 grams of dough. At 65 percent hydration with 2.5 percent salt and 0.5 percent yeast, the flour is 1,000 divided by 1.68, which is about 595 grams. The water is 65 percent of that, about 387 grams, the salt is about 15 grams, and the yeast is about 3 grams. Those numbers look odd compared with round recipe numbers, but they are exact for the batch, and exact dough behaves better than rounded dough.
Weighing in grams is the single biggest upgrade a home pizza maker can make. Cups measure volume, and flour packs differently every time you scoop, so one cup can weigh anywhere from 120 to 160 grams. That error alone can swing hydration by ten points and ruin a dough. A cheap kitchen scale removes it. Weigh the flour, weigh the water, weigh the salt, and even weigh the yeast if you can, because small errors in yeast change rise time a lot.
Fermentation turns these numbers into flavour. After mixing, let the dough rest, then divide it into balls and let them rise until roughly doubled, which can take a few hours at room temperature or overnight in the fridge. Cold fermentation in the fridge gives deeper flavour and a dough that is easier to shape the next day, so plan ahead when you can. Take the balls out an hour before shaping so they relax and stretch without tearing.
Use this calculator as your base for every pizza night, then adjust one thing at a time. Try a higher hydration next time, or a longer cold ferment, or a slightly larger ball for a thicker edge, but change only one variable so you know what made the difference. Pizza dough rewards patience and notes: write down the batch that worked, repeat it, and soon the numbers become second nature. Keep your scale on the counter and your notes nearby, and pizza night becomes easy.