A temperature is a single number, and a pizza responds to several things at once: how hot the surface under it is and how fast that surface gives up heat, how hot the walls, ceiling or element above it are, how fast the air moves, and how much water the dough and toppings still hold. Modernist Pizza (2021), by Nathan Myhrvold and Francisco Migoya, goes as far as saying the temperature you set “is not even close to the temperature that the pizza experiences.” This page explains why, using the book’s physics chapter, and what it means for the oven you have.
What the dial measures, and what the dough feels
An oven’s sensor is dry, and it reads what Modernist Pizza calls the dry-bulb temperature. Dough holds a lot of water, and like any wet food it experiences the cooler wet-bulb temperature, because water evaporating from its surface carries heat away. The book compares it to sweat cooling your skin.
While the surface is wet, it can’t get much hotter than the boiling point of water, 212°F (100°C): almost all the incoming heat goes into turning water to steam. Once a patch dries, its temperature climbs again. Above roughly 265°F (130°C), Maillard reactions start to brown it, and the crust typically tops out at about 320 to 355°F (160 to 180°C). The Maillard reaction page covers that chemistry.
Four ways heat moves into a pizza
Conduction from the floor. Heat flows directly from a hot floor, stone, steel or pan into the base. Modernist Pizza credits the speed at which a massive oven floor transmits heat for a Neapolitan pizza’s leoparded crust. In a kitchen oven, the book says, circulating air can’t deliver enough heat to the bottom of a pizza to cook it properly, so you add something that stores heat. It recommends a baking steel over a stone because steel is denser and gives up its heat to the pizza more quickly, and it puts a steel’s thermal conductivity at more than five times a stone’s. See pizza stone vs. pizza steel.
Radiation from hot surfaces. Everything hot gives off infrared light. Modernist Pizza calls radiation the most important kind of heat transfer for baking pizza, and the dominant one in wood- and gas-fired pizza ovens. Two details from the book:
- The flame isn’t the source. The team measured gas and wood flames and found them “optically thin”: they create light but no significant radiation for heat transfer. A gas oven works like “a spotlight shining on the ceiling,” and the pizza is baked by the hot ceiling and walls. In a wood oven the glowing embers, at about 1,200 to 1,500°C (2,190 to 2,730°F), also radiate strongly.
- Shiny and dark surfaces behave differently. Dark surfaces absorb and emit more radiant heat than shiny ones. Raw dough is pale and reflects most of the light that hits it; as it browns it absorbs more, so browning speeds itself up. Oven floor emissivity covers what this means for oven floors and infrared thermometers.
Moving air. Modernist Pizza points out that every oven has convection, since hot air rises and cool air sinks. A fan makes it stronger: forced convection raises the rate of heat transfer tenfold or more and can cut cooking times by up to 35% for some foods. For pizza that isn’t always good, because a fan sets the crust sooner and limits how far the pizza can expand. The book’s home-oven preheating method turns the convection fan off.
Steam and condensation. Water changing phase moves a great deal of heat. Modernist Pizza explains that condensing steam passes heat to a surface far more readily than still, dry oven air, because so much heat is released when water vapor turns back into liquid.
How fast radiant heat rises
Radiant heat rises steeply with temperature. Modernist Pizza explains that it follows the fourth power of absolute temperature, which means kelvins, not Celsius or Fahrenheit: if a surface’s absolute temperature doubles, it emits 16 times as much.
That kelvin detail matters, because the book itself slips on it elsewhere, with an example that treats 400°C as double 200°C and calls the difference 16 times. Done in kelvins, for equal areas with the same emissivity, a surface at 400°C (750°F) emits about 4.1 times as much thermal radiation as one at 200°C (390°F). That’s still a big difference, but it compares what the surfaces emit. It doesn’t predict how fast an oven cooks, which also depends on the oven’s surfaces, their distance from the pizza and its geometry, and on the conduction and air movement described above. And an oven’s setting isn’t necessarily the temperature of its walls or elements.
The practical point: the hotter the surfaces facing the pizza, the more strongly they radiate. That’s why a pizza oven’s dome matters so much, and why home methods so often finish under the broiler: the book says a high-temperature broiler element can reach 800°C (1,470°F).
What happens inside the dough
Oven spring is mostly steam. Modernist Pizza says the rise of a thin-crust pizza in a hot oven is “overwhelmingly due to steam” rather than carbon dioxide. A raw Neapolitan rim about 0.2 inch (5 mm) thick can finish about 1 inch (2.5 cm) tall.
Heat travels through the bubbles. The book reports that food scientists believe about three-quarters of the heat reaching the center of the crumb moves by convection within the bubbles, not by conduction through the dough. Water evaporates from the hot side of a bubble, crosses it as vapor and condenses on the cooler side, releasing its heat there. Physicists call this the heat pipe effect.
The crumb sets. Between about 140 and 176°F (60 and 80°C), starch gelatinizes and proteins coagulate, and the dough stops being stretchy. Starch gelatinization goes into the detail.
Why the middle bakes slowest
Wet sauce keeps the middle cool. Modernist Pizza found that evaporating sauce draws so much heat that the dough beneath can’t dry out and rise, and it’s the water, not the weight, that does it: in their tests, sand of the same weight didn’t hold the center down, but ice and a wet towel did.
The same effect leaves a gummy, undercooked layer where sauce meets dough, which the book calls “a fundamental flaw in pizza making.” In a series of 120 test pizzas, the only complete fix was prebaking the dough. Short of that, it helps to put the cheese on before the sauce and to keep the topping load moderate. For a wet center, see how to fix a soggy pizza bottom.
Pizza oven or kitchen oven: same physics, different balance
In a Neapolitan pizza oven, the AVPN’s 2024 regulations call for a floor of about 380 to 430°C (715 to 805°F) under a dome of about 485°C (905°F), and a bake of 60 to 90 seconds. The 2010 EU specification for Pizza Napoletana gives the same bake time but the two temperatures the other way round, with the floor at about 485°C and the dome at about 430°C. Either way, heat arrives fast from below and above, and the pizza leaves the oven before its crust dries out much.
In a kitchen oven at 500 to 550°F (260 to 288°C), Ken Forkish’s home-oven pizzas take about 7 minutes. That longer bake dries the crust much more, which is why he raises a Neapolitan-style dough to 70% hydration for a home oven, well above the hydration of a dough baked for 60 to 90 seconds in a Neapolitan oven. The Pizza Planner makes the same adjustment: 70% in a kitchen oven, 60% in an outdoor pizza oven.
Modernist Pizza lists the home oven’s handicaps: thin metal walls that lose heat quickly, uneven radiation from walls of different thickness and distance from the elements, a glass window that radiates much less than the walls, a cheap and often inaccurate sensor, and a door whose opening drops the air temperature within moments. Its own experiment with a mirror-finish stainless plate over the glass door of a pizza deck oven cut a Neapolitan bake at 750°F (400°C) from 2½ minutes to 1½, with more volume and leoparding. That was a commercial deck oven, not a home oven, but it shows how much radiation matters.
What to do with it
In a kitchen oven:
- Store heat under the pizza. Use a steel or stone on an upper rack and give it a full preheat. Where your steel or stone’s maker gives a preheat time, follow it: Baking Steel gives 60 to 75 minutes at 500 to 550°F for its 3/8-inch Pro and 60 minutes for its Original. Otherwise, the Planner allows 45 to 60 minutes at the oven’s hottest setting; Modernist Pizza recommends at least 30.
- Add heat from above. Forkish puts his steel or stone about 8 inches below the broiler and finishes many pizzas with about 2 minutes under it, checking after 1. That’s his method with his oven, not a universal instruction: your oven’s manual and your steel or stone maker’s instructions decide which rack positions are allowed and whether the steel or stone may go under the broiler.
- Keep the fan off for preheating, as Modernist Pizza advises, unless your oven’s manual says otherwise.
- Go easy on wet toppings. Evaporating sauce slows the middle, as above.
In an outdoor pizza oven, follow the maker’s procedure and judge readiness by the stone, read with an infrared thermometer at the spot where the pizza will sit, not by the air or a built-in gauge. The home pizza oven temperature guide has the temperatures by style and oven, and how to use an infrared thermometer without being misled by it.
Sources
- Nathan Myhrvold and Francisco Migoya, Modernist Pizza (2021), volume 1, printed pages 345–357 (heat transfer, convection, steam, radiation and the fourth-power law in kelvins, emissivity, flames and embers, the mirror-door experiment), 362–371 (dry- and wet-bulb temperatures, oven spring, the heat pipe effect, browning temperatures, sauce and the gel layer), 372 (the 400°C against 200°C example, corrected here) and 389–393 (convection ovens, home ovens, baking steel against stone, preheating).
- Ken Forkish, The Elements of Pizza (2016): chapter 2 (baking times and hydration for a home oven) and chapter 5 (baking with the broiler).
- Associazione Verace Pizza Napoletana: International Regulations, 2024 edition, printed page 12 (base and dome temperatures, cooking time). Checked October 14, 2026.
- European Commission, Regulation (EU) No 97/2010, Annex II: the Pizza Napoletana specification (floor and dome temperatures, bake time). Checked October 14, 2026.
- Baking Steel: Baking Steel Pro and Baking Steel Original product pages (preheat times). Checked October 14, 2026.