What Size Pizza Oven Does Your Restaurant Need?

Oven size is the decision with the longest consequences and the least reliable advice attached to it. Buy too small and service backs up every Friday for the life of the oven. Buy too big and you spend an extra hour heating it, burn more wood, and give up floor space you needed for something else.

This is the method we use at survey.

Start with your peak hour, not your day

Daily covers are the wrong number. What matters is the busiest single hour you have to serve, because that is the only time the oven becomes the bottleneck. If you do 300 covers across a day but 90 of them land between seven and eight on a Friday evening, you are sizing for 90.

If you are not open yet, take a comparable venue of similar size and location and be honest rather than optimistic. Sizing on a hoped-for peak is how kitchens end up with an oven that costs more to run than their trade justifies.

Realistic throughput by dome diameter

Working figures with one experienced operator on the peel, baking twelve-inch pizzas at 450–500 °C:

Dome	Pizzas at once	Per hour	Typical fit
90 cm	3	25–30	Domestic, very small sites
100 cm	4	40–50	Most working pizzerias
110 cm	5	55–65	Mid-size, mixed menus
120 cm	6	70–80	High turnover, functions

Note how the increments behave. Going from 100 to 120 buys roughly 60% more throughput for roughly double the heat-up time and materially more fuel. That trade is worth making above about 50 pizzas an hour and wasteful below it.

The operator is usually the real limit

This is the point most size discussions miss entirely. A 100 cm dome will physically bake more than 50 pizzas an hour. What caps it is one person launching, turning, and retrieving, while also managing the fire.

So before you upgrade the oven, work out whether you are short of oven or short of hands. A second operator on a 100 cm dome is far cheaper than a 120 cm oven with one — and it is a decision you can reverse next week if you are wrong.

A useful test: during your peak hour, is the oven ever sitting with empty floor space while pizzas wait to go in? If so, the oven is not your constraint.

Adjust for what else the oven does

If it cooks pizza and nothing else, size on pizza. If it also runs roasts, trays, or bread, you need either more floor or a different shape.

A barrel vault gives a rectangular floor that takes standard gastronorm pans; a dome of the same nominal size does not, and you end up improvising trivets. Bread argues for a different oven entirely — more hearth mass and a longer, gentler heat curve, which is what our bakery ovens are built for.

Three constraints that override the ideal size

• Floor loading. A 120 cm oven approaches two tonnes in a small footprint. Suspended floors frequently will not take it without structural work, and that has to be established before anything is ordered.
• Flue routing. Bigger oven, bigger flue. A 250 mm insulated flue needs a viable path to above the roofline, and in constrained sites that path sometimes does not exist. See flue and siting.
• Working space. An oven you cannot stand comfortably in front of with a three-metre peel is the wrong oven regardless of its output. You need room to launch, room to turn, and somewhere to set a pizza down.

Our siting guide covers these in detail.

Sizing for growth without overbuying

A fair question: what if trade doubles? Two honest answers.

First, a 100 cm oven with two operators covers a surprising amount of growth. The oven is rarely the first thing to break under increased trade — the kitchen line and the front of house usually are.

Second, if you genuinely expect to outgrow it, plan the flue and the footprint for the bigger oven now even if you build the smaller one. Extraction and structure are the expensive things to change later. The dome itself is comparatively straightforward to rebuild.

Common sizing mistakes

• Sizing on the oven you saw in Italy. That oven was serving a different menu at a different volume with a different crew.
• Sizing on peak day rather than peak hour. Produces an oven that spends most of the week half empty and expensive.
• Ignoring the mouth width. Two operators cannot work a mouth sized for one, no matter how big the floor behind it is.
• Forgetting heat-up time. A 120 cm dome takes about two hours from cold. If you open at noon, someone is lighting it at ten.

The short version

Take your peak hour. Match it against the throughput table. Sanity-check whether your real constraint is the oven or the staffing. Then confirm floor loading, flue routing, and working space before committing. If your peak hour is under 50 pizzas, a 100 cm dome is almost certainly the right oven.

Tell us your peak-hour covers and what else you cook, and we will size it with you — including telling you when the smaller oven is the better buy.

Three worked examples

A 60-cover trattoria, pizza is half the menu. Peak hour is roughly 35 covers, of which maybe 20 order pizza. Twenty pizzas an hour sits comfortably inside a 90 cm oven and very comfortably inside a 100. Buy the 100 for the recovery headroom, not because you need the floor area.

A 200-cover hotel with a poolside pizza station. Conference lunches concentrate: 120 covers inside ninety minutes, most of them ordering pizza. That is 80 an hour sustained, which is a 120 cm dome with two operators. A 100 would technically produce the pizzas but the floor would sag halfway through and the last forty guests would get a different product from the first forty.

A 40-seat café doing lunch only. Peak of 25 covers, perhaps 12 pizzas. A 90 cm dome is ample, reaches temperature in an hour, and leaves floor space the kitchen actually needed. Buying a 110 here would mean firing a large oven for twelve pizzas.

When to add an operator instead of an oven

The clearest signal is watching a service. If the oven regularly has empty floor while pizzas wait on the bench to be launched, the constraint is the person, not the equipment. A second pair of hands on a 100 cm dome costs a fraction of a 120 cm build and can be trialled next week.

The reverse signal is a full floor with pizzas queuing and a floor temperature that keeps dropping. That is genuinely an oven problem and no amount of staffing fixes it.

Mouth width, the dimension nobody asks about

Floor area gets all the attention; the mouth determines how fast you can actually use it. A mouth sized for one operator caps throughput regardless of how much floor sits behind it, and two people working a narrow mouth simply collide.

It is also the hardest thing to change afterwards — widening a mouth means rebuilding the arch, which means disturbing the dome. Specify it at survey against how many people will work the oven, not against the dome diameter.