Convert an Oven Recipe to an Air Fryer

To convert an oven recipe to an air fryer, set 25°F lower than the oven and look at the food at about two-thirds of the oven time. A recipe that says 400°F for 25 minutes becomes 375°F, with a first look around 16 minutes and a planned finish around 20. The recipe has no air fryer line, because most recipes do not.

The arithmetic is the same every time. What changes the result is the food, how full the basket is, and whether you treat the timer as an estimate. The chart below is the rule applied to common oven instructions. It is a starting range, not a test of your machine.

The conversion rule

Drop the temperature by 25°F (about 15°C) and cut the time by roughly 20%. Then start checking at two-thirds of the original time.

That 20% is a starting estimate for the chart below, not a single manufacturer setting. Ninja’s Foodi Air Roast FAQ says to lower a traditional oven recipe by 25°F and cut the time by 30%. On that oven’s Bake function, Ninja says to follow the oven recipe as written.

So that 400°F for 25 minutes becomes 375°F for about 20 minutes, with your first look at around 16 or 17 minutes. In Celsius, 200°C for 25 minutes becomes roughly 185°C for 20.

That last instruction is the one people skip and then regret. Air fryers vary enormously — a 4-litre basket model and an 8-litre dual-zone behave differently with the same numbers on the display — so the first time you convert a particular dish, treat the time as an estimate and your eyes as the authority.

Read the columns independently: any oven temperature pairs with any oven time. If your recipe’s time is not in the food chart, use this table. Many basket models top out around 400°F and some oven-style models go higher, and many set in 5- or 10-degree steps, so round to a setting your machine actually offers. In Celsius, subtract about 15°C.

Oven to air fryer conversion for common foods

Each row is the rule applied to an oven time recipes often print. Air fryer temperature is 25°F lower. Air fryer time is about 20% shorter. The first check is about two-thirds of the oven time. Pull the food when it is done, even if that is before the end of the range.

A basket that is one layer but packed edge to edge runs longer than a few pieces with air between them. The first time you cook a dish, use the first-check column, not the end of the range.

Anything much thicker than an inch, including a bone-in roast: drop the temperature as above, ignore the clock, and cook to internal temperature. Only do it if the basket still has air space around the food. A whole bird usually does not fit that way.

Tips that change the result

Don’t overcrowd

This is where most conversions fail. Food piled two deep blocks the airflow the machine is built around. The middle steams and the top browns. Cook in a single layer with a little space between pieces, and accept a second batch. The second batch is usually faster because the basket is already hot. A doubled recipe is two batches: scaling the ingredients does not scale the basket.

Shake or flip

Baskets have hot spots, usually toward the heating element. Shake vegetables and fries halfway, or twice if the oven recipe was a long roast. Flip chicken, chops, and meatballs once. Thirty seconds of that does more than chasing the temperature by another five degrees.

Preheat

For anything you want crisp, preheat for three to five minutes. For a slow bake it matters much less. Some models heat so fast that the manual tells you not to bother. Check yours before you invent a ritual the machine does not need. A light coat of oil helps lean food brown; the air fryer is not a deep fryer, and a pool of oil is not the goal.

Adapting baked goods

Cookies, biscuits, and other small items can move across: 25°F lower, a small batch so air can move, and a look at about two-thirds of the oven time. The tops color before the center is set, so judge doneness by the middle, not by color alone. Use a small pan or a parchment round that leaves a gap around the edge. Food has to hold the parchment down before the fan starts. Loose parchment can lift into the element.

Muffins and quick breads are less predictable. Use the temperature drop, check early, and expect a drier top than the same batter in a still oven. Cakes, soufflés, custards, and anything whose rise depends on still air do not belong in the basket. The fan is the problem, not the temperature math.

Why those numbers, and not some others

An air fryer is a small convection oven with an aggressive fan. Nothing is being fried. The fan moves hot air fast enough that heat transfers into the food considerably quicker than in a still oven, and the chamber is small enough to recover temperature almost instantly when you open it.

That is the whole explanation for both adjustments. The faster heat transfer is why the time comes down. The reason the temperature also comes down is that the surface would otherwise run ahead of the interior — you would get a dark crust over an underdone middle, which is the single most common air fryer disappointment.

It also explains why the conversion is more forgiving on thin things than thick ones. Chicken tenders, fries, sliced vegetables and fish fillets convert almost perfectly. A thick bone-in roast is where the crust-versus-centre problem bites, and where a thermometer stops being optional.

Five recipes that do not convert

This is the part a conversion chart will not tell you, and it saves more dinners than the arithmetic does. A saucy pasta bake belongs here, not in the food table.

• Anything in a wet batter. Beer-battered fish, tempura, corn dogs. The fan blows liquid batter off the food and onto the element before it can set. Dry coatings — flour, egg, breadcrumbs, pressed on firmly — work beautifully. Wet ones do not.
• Anything soupy. Braises, casseroles with a lot of liquid, curries. There is nothing for the fan to do, and the liquid will simply sit there.
• Large roasts and whole birds. Not because it cannot be done, but because most baskets cannot hold one with air space around it, and air space is the entire mechanism.
• Loose light leaves. Kale chips are the classic disaster — untethered leaves fly into the heating element. If you insist, weigh them down or use a rack.
• Delicate risen bakes. Soufflés, chiffon cakes, anything whose structure depends on still air. The fan is not gentle.

Use a thermometer, not the clock, for meat

Converted times are estimates by definition, so for anything where undercooking matters, temperature is the only honest test. The USDA safe minimums worth memorising: poultry 165°F (74°C), ground meat 160°F (71°C), pork and whole cuts of beef, veal and lamb 145°F (63°C) with a three-minute rest, and fish 145°F (63°C).

An instant-read thermometer costs less than one ruined chicken and removes the guessing permanently.

Where an app helps, and where it does not

Worth being straight about this: RecipeScan does not convert oven instructions into air fryer instructions for you. No app can reliably do that, because the answer depends on your machine, the thickness of what you are cooking and how full the basket is — the three things a recipe file knows nothing about.

What it does do is get the recipe onto your phone in the first place. Photograph a cookbook page, a handwritten card or a screen and the recipe becomes a proper ingredient-and-step list you can follow hands-free while cooking, with timers you start by voice instead of with greasy fingers. It also has plenty of recipes written for an air fryer from the start, which is generally better than converting one. And if you are cooking for a different number of people than the recipe assumes, it will scale the quantities for you — though remember that scaling the ingredients does not scale the basket, so a doubled recipe is two batches.

Do the conversion yourself with the line at the top of this page. Let the app handle getting the recipe there and keeping your hands free.

Going the other way, from a quick stovetop recipe to an all-day one? A slow cooker changes the liquid as well as the clock; our guide to converting a recipe to a slow cooker has the time chart and what to add last.

Frequently asked questions

How do I convert an oven recipe to an air fryer?

Lower the temperature by 25°F (about 15°C) and check early. Ninja’s Foodi Air Roast FAQ says to also cut the time by 30% for a traditional oven recipe; on Bake, follow the oven recipe as written. This page uses about 20% less time as a starting estimate, so 400°F for 25 minutes becomes 375°F for about 20 minutes, with a first look around 16 minutes.

What is the oven to air fryer conversion for common foods?

Apply the same rule to the oven time the recipe prints. Bone-in chicken thighs at 400°F for 35–45 minutes start at 375°F for about 28–36 minutes. Vegetables at 425°F for 20–30 minutes start at 400°F for about 16–24 minutes. These are starting ranges, not a test of your machine. Look at about two-thirds of the oven time, and use a thermometer for meat.

Do I need to preheat an air fryer?

For anything you want crisp, yes — three to five minutes. For a slow bake it matters much less. Some models heat so fast that the manual tells you not to bother; check yours.

Should I shake or flip food in an air fryer?

Yes. Halfway for most foods, and more than once for vegetables. Baskets have hot spots, usually toward the heating element. A shake or a flip does more for even cooking than fine-tuning the temperature.

What happens if I overcrowd the air fryer basket?

The fan cannot move air, so the middle steams and the top browns. Cook in a single layer with space between pieces. Two batches beat one crowded basket. The second batch is usually faster because the machine is already hot.

Can I convert baked goods from an oven recipe?

Small items such as cookies can, at 25°F lower, in a small batch, checked early. The tops color before the center is done. Cakes, soufflés, and anything that needs still air do not convert well. The fan and the small chamber change the rise.

Can I use foil or parchment in an air fryer?

Usually, with two conditions: never cover the whole base, because that blocks the airflow the machine works by, and never put either in empty before the food. Loose parchment can lift into the element.

Why is my food dry in the air fryer?

Almost always overcooking, because the converted time was treated as a finish time rather than an estimate. Start checking at about two-thirds of the oven time. A light coat of oil on lean food helps; so does a rest before cutting.

Does the 25°F rule work in reverse?

Yes, roughly. Add 25°F and about a quarter more time to take an air fryer recipe to a conventional oven. Expect it to be less crisp, because a full-size oven cannot move air the same way.

Do convection ovens need the same adjustment?

They need the temperature drop but not the same time cut. A convection setting on a full-size oven is usually about 25°F lower than the stated conventional temperature, with only a slightly shorter time. The air fryer’s extra speed comes from its small chamber, not just from having a fan.