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Convection Oven Converter
Convert any conventional oven recipe to convection (fan-forced): lower the temperature, shorten the time, keep the result.
Your results
Convection temperature
325°F / 163°C
Or keep the temperature and cut the time
30 min
Time at the lower temperature
40 min
Start checking at
26 min
Drop the temperature by 25°F (15°C) and keep the time, or keep the temperature and cut the time by a quarter. Both work. The first is safer for anything delicate; the second is what you want when dinner is late.
A convection oven moves air across the food, which strips away the insulating layer of cooler air that sits against every surface in a still oven. That is why it browns better and cooks faster at the same dial setting — and why it is worth the adjustment rather than fighting it.
Some things do not want a fan. Cakes, soufflés and custards set from the outside in and can crack or dome unevenly in moving air. Roasts, sheet-pan vegetables, cookies and anything you want crisp all improve. Many ovens let you turn the fan off for exactly this reason.
Questions people ask
Conventional to convection — what is the rule?
Minus 25°F (15°C) at the same time, or the same temperature at 75% of the time. Do one or the other, never both, or you will underbake.
Should I use convection for baking?
For cookies, pastry and bread, yes — the fan gives even browning and better rise from steam. For cakes and custards, turn it off; moving air sets the edges before the middle catches up.
Is convection the same as an air fryer?
Mechanically, yes — an air fryer is a small convection oven with a fast fan and a basket. The difference is size: less air to heat, less food to heat it, so everything happens sooner.