What My Pizzaiolo Training Taught Me About Dough Hydration

Before Baker Calculator existed, it existed as a notebook. Before that, it existed as roughly six months of Tuesday evenings: one day a week, half theory and half hands in the dough, at a temporary S.N.I.P. affiliate location that was running in Utrecht, the Netherlands at the time. The weeks weren’t always back-to-back; a few got skipped and pushed. It ended, half a year later, with a proper exam, theory and practice both. That’s where I trained as a pizzaiolo, and it’s where most of what this calculator is built on actually comes from.

Today, S.N.I.P. runs its main courses in Italy, and has affiliate locations in a number of other countries, though as far as I know, there isn’t currently an official location in the Netherlands. If you’re curious, their course finder is the best way to check what’s running near you.

I want to share a few of the lessons that stuck with me the longest from those six months. Not the fancy ones, the practical ones. The kind you only really understand once your hands are in the dough.

Dough isn’t one thing — it’s three

One of the first things we covered in theory was that “making dough” isn’t a single method. There’s direct dough (impasto diretto), where everything goes in together and ferments in one go: fast, straightforward, forgiving. There’s semi-direct dough, which uses a small pre-fermented portion to build flavor before the main mix. And there’s indirect dough, where a portion ferments separately, sometimes for many hours, before joining the rest.

Nobody tells you this as a home baker, and it’s genuinely useful to know: the “best” dough isn’t one of these three. It depends entirely on your timeline, your flour, and what texture you’re after. I still default to a simple direct dough on a weeknight, and save the longer indirect methods for weekends when I actually have time to enjoy the process.

Water temperature matters more than the recipe admits

A big chunk of our theory hours went into something most recipes skip entirely: calculating and managing water temperature. Not “cold water” or “room temperature water”. Actual numbers, worked out from your flour temperature, your room temperature, and how long you want fermentation to take.

I remember thinking this was overkill, until I made the same dough on a cold December morning and a warm July afternoon using the exact same recipe, and got two completely different doughs.

That’s really what hydration and temperature control are about: consistency. Once you understand the relationship between water, flour, and fermentation time, you stop guessing and start adjusting on purpose.

Not all flour behaves the same

This is the one I already wrote about on the calculator page itself, but it’s worth repeating here because it was such a core part of the training: flour strength (how much water it can absorb and hold onto during a long fermentation) is not something you can eyeball. Italian millers rate it by W-value, French millers by ash content (the T-number), and most of the rest of the world by protein percentage on the packaging.

What this means practically: the same hydration percentage can feel completely different depending on the flour bag in front of you. A 65% hydration dough with a weak all-purpose flour behaves nothing like 65% with a strong bread flour. Once that clicked for me, a lot of dough failures from earlier years suddenly made sense.

Your hands learn what numbers can’t teach

Every session split roughly in half: an hour or two of theory, then straight into the practical side: dividing dough balls, stretching, managing dough that had been resting in the fridge, baking the same dough at different oven temperatures and comparing the results side by side. No amount of reading replaces that. At some point, the dough itself tells you if it’s ready: a certain give, a certain elasticity. And that only comes from doing it, badly, a few dozen times first, week after week, until the exam finally rolled around.

Why I built the calculator anyway

None of this means the numbers don’t matter — they’re exactly what let me repeat a good result on purpose instead of by accident. That’s the whole idea behind Baker Calculator: it won’t teach you what your hands need to learn, but it will get the ratios right every time, so you can spend your attention on the part that actually takes practice. If you want to try it out, start with a simple 60–65% hydration for a classic round pizza dough, and adjust from there once you get a feel for your own flour.

— Rob