🍟 Air Fryer Conversion Calculator
Convert any oven recipe to air fryer temperature and time: minus 25°F, minus 20% time.
Air Fryer Setting
How to Convert Oven Recipes to the Air Fryer
An air fryer is a small, powerful convection oven, so food cooks hotter and faster than in a conventional oven. The rule every air fryer cook learns first: drop the temperature 25°F and cut the time by 20%. Enter your recipe's oven temperature and time above, pick Fahrenheit or Celsius, and the calculator returns the air fryer setting instantly.
Read the oven temperature and time from your recipe or the package directions.
Enter them above and choose your unit. The calculator subtracts 25°F (about 15°C) and multiplies the time by 0.8.
Preheat the air fryer 3 to 5 minutes, arrange food in a single layer, and set the converted time.
Check a few minutes early the first time. Every air fryer runs slightly hot or cool, so treat the conversion as a starting point.
The Air Fryer Conversion Formula
A recipe calling for 425°F and 30 minutes becomes 400°F and 24 minutes. In metric, 220°C and 30 minutes becomes 205°C and 24 minutes. The physics behind it: rapidly circulating hot air strips away the cool boundary layer around food, transferring heat far faster than still oven air, and the small chamber reaches temperature in minutes instead of a quarter hour.
Worked Example: Frozen Fries
The bag says 425°F for 30 minutes in a conventional oven. Enter 425 and 30 with Fahrenheit selected. The calculator returns 400°F and 24 minutes. Spread the fries in a single layer, shake the basket at the 12-minute mark, and start checking at 20 minutes. Most batches land between 22 and 26 minutes depending on fry thickness and how crowded the basket is, which is exactly why the first run of any new food is a calibration run.
Tips for Crispy Results
Space is the secret ingredient. Food needs hot air touching every surface, so a single layer with gaps beats a heaped basket every time; cook in batches when you must. Pat proteins and vegetables dry before seasoning, because surface moisture has to evaporate before browning starts. A light mist of high-smoke-point oil like avocado oil helps color and crunch. Shake the basket or flip pieces halfway so both sides see the heat, and pull food the moment it looks done: carryover crisping finishes the job on the counter.
Reheating is where the air fryer quietly beats the microwave: leftover pizza at 375°F for 4 minutes comes back crisp, fried chicken at 375°F for 5 minutes re-crispens without drying, and roast vegetables revive in 5 minutes at 400°F. For baking, reduce your usual oven recipe by the same 25 degrees and start checking at 75% of the time; small cakes and muffins do well because the compact heat sets the crumb fast. And clean the basket while it is still warm: a hot rinse and a soft brush take 30 seconds, while cooled-on grease takes ten minutes and steel wool you should not be using on nonstick.
When the Rule Needs Adjusting
Thick items like bone-in chicken thighs sometimes want the full temperature drop but only a 10 to 15% time cut, since the interior needs the minutes. Delicate baked goods can go the other way: drop 25 degrees but keep a closer eye, tenting with foil if the top races ahead. Frozen foods straight from the freezer often need the converted time plus 2 to 3 minutes. And if your model is a toaster-oven style with more space, it behaves closer to a real oven, so shave only 15 degrees off and watch it.
Air Fryer vs Convection Oven: What's Different
An air fryer is a convection oven, but the size difference changes the cooking. A full-size convection oven circulates air through a large cavity, so the 25-degree reduction still applies, but the time savings shrink to about 10%. The air fryer's tiny chamber is why the 20% time cut works: food sits inches from the heat source and the fan. If your oven has an "air fry" mode with a mesh tray, treat it like a full oven with the temperature drop but only a 10% time cut, and expect less browning than a dedicated basket model.
Basket models versus toaster-oven models also differ. Basket fryers concentrate heat and crisp fastest; toaster-oven styles have more room, cook more evenly, and behave closer to a regular oven. With a toaster-oven style, start with only a 15-degree reduction and watch closely. The calculator's 25-degree rule targets the classic basket design most people own. When in doubt, convert conservatively and add minutes; you can always cook more, but you cannot unburn.
Common Mistakes to Avoid
Skipping the conversion and using oven settings directly is the number one error: the outside burns while the inside stays raw. Overcrowding is number two, turning crispy plans into steamed disappointment. Number three is forgetting that the heating element sits inches above the food, so anything tall, like a risen cake or thick pork chop, can scorch on top. Finally, never trust the timer alone for proteins; a $15 instant-read thermometer is the difference between safe chicken and a guess.
Second Worked Example: Bone-In Chicken Thighs
A package of bone-in, skin-on thighs says 425°F for 40 minutes in the oven. Enter 425 and 40: the calculator returns 400°F and 32 minutes (40 × 0.8 = 32). Arrange the thighs skin-up in a single layer with space between them, and set the timer for 32 minutes. Start checking at 28 minutes, because bone-in pieces vary in thickness. The thighs are done when an instant-read thermometer reads 165°F in the thickest part, away from the bone; that is the USDA safe temperature for poultry, and it applies no matter what the timer says. Rest them 5 minutes so the juices redistribute, which is the difference between crispy-skinned and soggy-skinned.
Basket Size Changes the Math
The conversion rule assumes food sits in a single layer with air moving around it, and basket size decides whether that is possible. A compact 3.5-quart fryer fits about two chicken breasts or a handful of fries per batch; a 5.5 to 6-quart model handles a full family portion in one go. Crowding a small basket to avoid a second batch backfires: two stacked layers steam, and you end up running two long batches anyway. One honest batch in a big basket beats two cramped batches in a small one every time. When buying, size for your largest regular meal, not your average one.
Small foods also cook differently by basket depth. In a deep, narrow basket, the top layer sits closer to the heating element and browns faster, so shaking matters more. Wide, shallow baskets cook more evenly and forgive less shaking. If your model is the deep kind, shake twice instead of once; the 30 seconds of effort is the difference between half-burnt, half-pale and evenly golden.
The Oil Math: How Much Fat You Actually Save
The health claim around air frying is real but worth quantifying. A tablespoon of cooking oil carries about 120 calories and 14 grams of fat. Pan-frying a batch of chicken in 2 tablespoons adds roughly 240 calories of oil to the pan, and a meaningful share ends up in the food. The air fryer version needs a light spray, about a quarter teaspoon, which is roughly 10 calories. Deep frying is a different universe: heating 2 quarts of oil for a batch that absorbs even a fraction of it dwarfs both.
The honest caveat is that breaded frozen foods already contain oil from manufacturing, so the savings apply most to foods you would otherwise pan-fry or deep-fry yourself. And fat is flavor: food cooked with zero oil tastes flat compared to the same food with a light mist. The spray is not cheating; it is the technique.
The Shake Schedule
Shake at one-third and two-thirds of the way through, not just halfway. Two shakes beat one because the pieces that start on the bottom spend less total time there. For fries, that means shaking at 8 and 16 minutes of a 24-minute cook. Toss, do not stir: a gentle basket shake reorients without breaking crusts.
Frequently Asked Questions
How do you convert oven temperature to air fryer?
Subtract 25°F from the oven temperature. A recipe calling for 425°F in a conventional oven becomes 400°F in the air fryer. In Celsius, subtract about 15°C. This works because the air fryer's compact chamber and circulating fan cook food more efficiently than still oven air. Use it as a starting point and check early.
How do you convert oven time to air fryer time?
Multiply the oven time by 0.8, which removes 20%. A 30-minute oven recipe becomes 24 minutes in the air fryer. Because every model runs a little hot or cool, set the timer for the converted time but check doneness a few minutes before it ends the first time you try a new dish.
Do you need to preheat an air fryer?
Most foods do better with a 3 to 5 minute preheat, which helps the exterior start crisping immediately. Many newer models have a preheat setting built in. For delicate baked goods, preheating matters more; for frozen foods, you can often skip it and add a minute. Check your manual, since some brands advise against empty preheating.
Why is my air fryer food not crispy?
Overcrowding is the usual culprit: food piled in layers steams instead of crisping. Cook in a single layer with space between pieces, shake the basket halfway, and pat wet foods dry before seasoning. A light spray of oil helps browning. If the outside browns before the inside cooks, drop the temperature another 15 to 25 degrees.
Can you put parchment paper in an air fryer?
Yes, but only with food on top of it to weigh it down. Loose parchment can blow into the heating element and scorch. Use perforated parchment liners made for air fryers so air still circulates underneath. Never preheat with just paper inside, and keep the paper away from the upper heating element.
What temperature do you air fry chicken at?
Bone-in chicken pieces do well at 380°F for 20 to 25 minutes, flipped halfway, until the thickest part reads 165°F. Boneless breasts cook at 375°F for about 15 to 18 minutes depending on thickness. Wings get crispiest at 400°F for 20 to 25 minutes with a shake midway. Always verify with a meat thermometer, not the clock.
Can I bake a cake in an air fryer?
Yes, in a pan that fits with airflow around it, typically 7 inches or smaller for most basket models. Convert the recipe with the 25-degree and 20% rule, then check with a skewer early. The top browns fast because the heating element sits close, so tent with foil if the crust darkens before the center sets.
Do air fryers use a lot of electricity?
A typical air fryer draws 1,200 to 1,800 watts, similar to a toaster oven, but it runs for much shorter times than a full oven. Heating a small chamber for 20 minutes uses far less energy than heating a whole oven for 45. For small meals it is one of the cheapest ways to cook with electricity.
What foods should you not cook in an air fryer?
Wet batters drip through the basket and make a mess; bread them instead. Large roasts can burn outside before cooking through. Popcorn kernels, uncooked grains, and leafy greens that fly around are poor candidates. Cheese on its own melts into the drip tray. Most other oven foods convert just fine.
Is air frying healthier than deep frying?
Air-fried foods use a fraction of the oil, typically a teaspoon of spray versus cups for deep frying, so they carry significantly fewer calories from fat. The food itself is the same; the difference is the cooking medium. Studies on acrylamide formation also favor air frying for potatoes, since less oil and shorter times mean fewer of those compounds.