Cooking

Air Fryer Calculator

A starting air-fryer temperature and time from an oven recipe.

Free to use — no sign-up or login.

Air fryer temperature

Start checking at

min

An oven recipe runs hot and long inside a small fryer. Subtract 25°F, or about 15°C if the card is in Celsius, and keep 80% of the minutes.

The oven number itself, if it is only a Celsius or Fahrenheit swap, belongs on the oven temperature calculator.

The starting pair

400°F minus 25 is 375°F. Thirty minutes times 0.8 is 24 minutes. On Celsius, 200°C minus 15 is 185°C, and the minutes are still multiplied by 0.8.

Check before the timer

The cited chart uses this same subtraction and the same 0.8 time, and it tells you to look early. Models differ. A crowded basket cooks slower than a single layer.

Worked example: 400°F for 30 minutes

Fahrenheit, oven temperature 400, oven minutes 30. Air fryer temperature 375°F. Start checking at 24 min.

\[ 400-25=375,\ 30\times 0.8=24 \]

Frequently asked questions

What is 180°C for 20 minutes?

Celsius subtracts 15, so the temperature starts at 165°C. The time is 20 × 0.8 = 16 minutes.

Do I subtract 25°F and 15°C both?

No. Use 25 when the card is Fahrenheit and 15 when the card is Celsius. Time always uses 0.8.

Is 24 minutes when the food is done?

It is when to start looking. The page is not a doneness test.

Does this know a safe internal temperature?

No. Chicken and leftovers still need a food thermometer. This is not a food-safety temperature.

What if the recipe was already written for a fan oven?

The subtraction assumes a conventional oven card. A fan or convection card may already be the lower setting.

References

Assumptions and limitations

A starting point only. Check a few minutes early, because models differ. Not a doneness test and not a safe internal temperature.