Oven to Air Fryer Conversion: Time and Temperature Rules That Work

Why an air fryer cooks faster

An air fryer is a small countertop convection oven. A heating element and a strong fan push hot air around a compact basket, so heat reaches the food quickly and evenly. A conventional oven has a large cavity and gentler airflow, so it takes longer to transfer the same heat. That is why the same food browns sooner in an air fryer, and why you lower the temperature slightly as well as the time.

The rule of thumb

• Reduce the temperature by about 15 °C (25 °F).
• Reduce the time by about 20%.
• Check at about 80% of the new time, then add minutes if needed.

This is a starting point, not a law. A compact 3 litre model heats faster than a large 8 litre one, and older machines may run hotter than the dial says.

The air fryer converter does these sums in °C or °F, and also works backwards from an air fryer recipe to an oven.

Converting in the other direction

If a recipe is written for an air fryer and you want to use an oven, raise the temperature by about 15 °C and increase the time by about 25%. Preheat the oven fully first. Use a rack or tray that lets air move under the food if you want crisp results.

Foods that convert well

• Chicken wings, drumsticks and pieces, which crisp well in circulating air.
• Potato wedges, chips and roast potatoes.
• Vegetables such as broccoli, cauliflower, carrots and Brussels sprouts.
• Frozen foods such as nuggets, fish fingers and spring rolls.
• Salmon and other fish fillets.
• Small bakes such as cookies, if you use parchment.

Foods that do not suit most air fryers

• Wet batters, which drip through the basket and set unevenly.
• Large roasts that do not fit in a single layer or leave no room for air.
• Light foods such as leafy greens, which can blow around and burn.
• Anything cooked in a lot of liquid.

Safe cooking temperatures

Browning is not proof that food is cooked. Use a probe thermometer. The US Department of Agriculture recommends 74 °C (165 °F) for poultry, 71 °C (160 °F) for ground beef and 63 °C (145 °F) for fish. Check the thickest part of the food, and add a minute or two if it is short. Frozen food often needs extra time even after the rule has been applied, so follow the package for the final check.

Tips for better results

• Preheat for about three minutes. It helps browning and makes the timing more predictable.
• Cook in a single layer, and work in batches if needed.
• Dry food with paper towel before cooking. Moisture is the enemy of crispiness.
• Use a thin film of oil. A little goes a long way, because the fan spreads it.
• Shake the basket or flip the food halfway through.
• Cut pieces to a similar size so they finish together.

Troubleshooting

Food is pale and soft. The basket is too full, the food is too wet, or the temperature is too low. Cook less at a time and dry the food first.

Outside is dark but the middle is raw. The temperature is too high for the thickness. Lower it by 10 °C and extend the time.

Food is dry. The time is too long. Check earlier, and use a little more oil or brush on a sauce near the end.

Smoke. Fat has dripped onto the heating area. Clean the basket and drip tray, and avoid very fatty foods at high heat.

Different results in each batch. Preheat each time, or add a minute to the second batch.

How we recommend you use the result

Use the converted numbers as the first attempt. Write down what worked on the recipe, such as "air fryer, 185 °C, 22 minutes", and use that next time. After two or three tries you will have the exact setting for your machine.