240°C Oven to Air Fryer: Use 220°C
Drop the temperature by 20°C and cut the time by 20% as a starting point.
Published by the RecipeAirFryer editorial team · How we source times · Updated
Times and temperatures come from our reviewed cooking database. Explanatory text on each page is generated from that entry so the numbers stay consistent.
If a recipe says 240°C, set a typical basket air fryer to 220°C (220°C / 428°F) and plan on about 80% of the oven time. At this oven setting people usually cook pizza steels, blistering naan, the top of a dual-temp recipe. The 20% rule is a starting point; Few home air fryers truly hold 220°C+. If the food chars in 60 seconds, drop the heat.
How to convert 240°C to an air fryer
- 1Read the oven recipe: it calls for 240°C (240°C / 464°F).
- 2Preheat the air fryer to 220°C (220°C / 428°F), not 240°C.
- 3Multiply the oven minutes by 0.8. Example: naan that would see 3 minutes at 240°C in a stone oven becomes 2-3 minutes at 220°C, because this heat is about blistering not baking through.
- 4Cook in a single layer and check early. Few home air fryers truly hold 220°C+. If the food chars in 60 seconds, drop the heat.
Conversion chart
| Oven time at 240°C | Air fryer time at 220°C |
|---|---|
| 10 min | 8 min |
| 15 min | 12 min |
| 20 min | 16 min |
| 25 min | 20 min |
| 30 min | 24 min |
| 40 min | 32 min |
| 45 min | 36 min |
| 60 min | 48 min |
What 240°C is usually used for
In a conventional oven, 240°C is the setting for pizza steels, blistering naan, the top of a dual-temp recipe. Converting that heat without thinking about the food is why people burn cookies or undercook a joint.
Worked example: naan that would see 3 minutes at 240°C in a stone oven. In the air fryer that is 2-3 minutes at 220°C, because this heat is about blistering not baking through.
Why the temperature drops
An oven heats mostly by radiation from its elements and by slow convection. An air fryer is a small chamber with a fan driving air across the food at speed, so heat transfers into the surface much faster at the same dial setting.
That is why 240°C in an air fryer would over-brown the outside before the middle caught up. Setting it to 220°C instead gives you the same finish in less time.
What to watch at 220°C
Few home air fryers truly hold 220°C+. If the food chars in 60 seconds, drop the heat.
Dense items such as a whole chicken may need close to the original oven time because heat still has to travel to the centre. Go by internal temperature, not only the converted clock.
Gas mark 9 in an air fryer
240°C is roughly gas mark 9. If your recipe is written in gas marks, convert to 240°C / 464°F first, then apply the same drop to get 220°C / 428°F in the air fryer.
Frequently Asked Questions
What is 240°C in an air fryer?
220°C, which is 220°C / 428°F. Reduce the cooking time by about 20% as well, then check early.
What foods are usually cooked at 240°C?
pizza steels, blistering naan, the top of a dual-temp recipe. Example conversion: naan that would see 3 minutes at 240°C in a stone oven becomes 2-3 minutes at 220°C, because this heat is about blistering not baking through in the air fryer.
Why not just use 240°C in the air fryer?
You can, but the outside will brown or burn before the inside is cooked. The fan transfers heat into the food far faster than an oven does, so the lower setting gives a more even result.
Do I need to preheat the air fryer?
A 2-3 minute preheat helps for anything breaded, frozen or that you want crisp. For longer cooks it makes little difference.