Lower the oven temperature by 25°F (about 15°C) and cut the time by roughly 20%.
Air fryers circulate hot air aggressively, so check earlier than you think.
Skip the air fryer for thin wet batters (tempura, pancake-style coatings) — they drip and won't set.
Very large roasts and tall cakes do better in a full-size oven.
How the conversion works
Lower the temperature by 25°F and cut the time by about 20%.
Lower the oven temperature by 25°F (about 15°C) and cut the time by roughly 20%.
Air fryers circulate hot air aggressively, so check earlier than you think.
Skip the air fryer for thin wet batters (tempura, pancake-style coatings) — they drip and won't set.
Very large roasts and tall cakes do better in a full-size oven.
Example calculation
A 400°F oven recipe for 20 minutes becomes 375°F / 190°C for 15–16 min. The range comes from checking at 75% of the oven time and treating 80% as the nominal endpoint.