Oven to Air Fryer Conversion: Temperature, Time & What Actually Works
Quick answer: Reduce the oven temperature by 25°F (15°C) and cut the cooking time by 20-25%. A recipe that calls for 400°F for 20 minutes becomes 375°F for 15-16 minutes in the air fryer. Need exact numbers? Use our air fryer converter.
I spent my first month with an air fryer converting oven recipes by feel. Sometimes it worked. More often, I pulled out charred broccoli or undercooked chicken thighs. The problem was simple: I was guessing instead of following the math.
An air fryer is a compact convection oven. The heating element sits inches from the food, and a powerful fan circulates hot air at high speed in a tight space. That concentrated airflow means food cooks faster and at lower temperatures than a standard oven. Once I understood the formula — 25°F less, 20% less time — my success rate went from about 50% to nearly perfect.
This page gives you the formula, a conversion chart for 20+ common foods, and a list of what you should never put in an air fryer. Bookmark it and stop guessing.
The Conversion Formula
The core rule is straightforward:
- Temperature: Subtract 25°F (about 15°C) from the oven temperature
- Time: Reduce by 20-25%
This works because air fryers move heat more efficiently than conventional ovens. A standard oven heats a large cavity and relies on radiant heat plus natural convection. An air fryer blasts focused hot air around the food in a space roughly 1/10th the size. Less air to heat, shorter distance to the food, more direct contact.
One caveat: the 25°F rule assumes a conventional (non-convection) oven recipe. If you're converting from a convection oven recipe, skip the temperature reduction — just cut the time by 10-15%. Convection ovens already use fan-assisted airflow, so the temperature gap is smaller.
The Complete Conversion Chart
These conversions assume a standard basket-style air fryer (1500-1700W) that's been preheated for 3-5 minutes. Always check food 2-3 minutes before the minimum time listed.
| Food | Oven Temp | Oven Time | Air Fryer Temp | Air Fryer Time | Notes |
|---|---|---|---|---|---|
| Chicken breast (boneless) | 400°F | 25-30 min | 375°F | 18-22 min | Flip halfway, internal 165°F |
| Chicken thighs (bone-in) | 425°F | 35-40 min | 400°F | 25-28 min | Skin-side up, flip at 15 min |
| Chicken wings | 425°F | 40-45 min | 400°F | 22-26 min | Shake basket every 8 min |
| Salmon fillet | 400°F | 12-15 min | 375°F | 8-10 min | No flip needed |
| Pork chops (1 inch) | 400°F | 20-25 min | 375°F | 12-15 min | Flip halfway, internal 145°F |
| Bacon | 400°F | 15-20 min | 375°F | 8-10 min | No flip, drain grease at 5 min |
| Roasted broccoli | 425°F | 20-25 min | 375°F | 8-10 min | Shake halfway, don't crowd |
| Brussels sprouts | 425°F | 25-30 min | 375°F | 12-15 min | Halve them, shake at 8 min |
| Asparagus | 400°F | 12-15 min | 375°F | 6-8 min | Single layer, no flip |
| Cauliflower florets | 425°F | 25-30 min | 375°F | 12-15 min | Toss in oil first, shake twice |
| Sweet potato fries | 425°F | 25-30 min | 400°F | 15-18 min | Single layer, shake every 5 min |
| Baked potato | 400°F | 45-60 min | 400°F | 35-40 min | Poke holes, rub with oil |
| Meatballs | 400°F | 20-25 min | 375°F | 10-12 min | Shake halfway |
| Fish sticks (homemade) | 425°F | 15-18 min | 400°F | 8-10 min | Flip once at halfway |
| Roasted garlic | 400°F | 40 min | 375°F | 20-25 min | Wrap in foil |
| Stuffed peppers | 375°F | 30-35 min | 350°F | 15-18 min | Check filling temp |
| Zucchini chips | 425°F | 20-25 min | 375°F | 10-12 min | Thin slices, single layer |
| Corn on the cob | 400°F | 25-30 min | 375°F | 10-12 min | Brush with butter, turn twice |
| Shrimp | 400°F | 8-10 min | 375°F | 5-6 min | Single layer, flip once |
| Tofu cubes | 400°F | 25-30 min | 375°F | 12-15 min | Press dry first, shake twice |
Why the Formula Works (and When It Doesn't)
The 25°F / 20% rule is reliable for about 80% of recipes. It works because the physics are consistent: a smaller cooking chamber with forced convection transfers heat faster.
But the formula breaks down in specific situations:
Baked goods with rising time. Bread, cakes, and muffins need sustained, even heat to rise properly. Air fryer fans can create hot spots that set the outside before the inside finishes rising. A muffin that needs 22 minutes in the oven doesn't just need 17 minutes in the air fryer — it needs a lower temperature (by 30-40°F, not 25°F) and potentially more time to avoid a raw center under a browned top.
Large roasts and whole chickens. A 5-pound chicken won't fit in most air fryer baskets, and even if it does, the tight space blocks airflow around the bird. The outside overcooks while the center stays dangerously undercooked. For anything over 3 pounds, stick with the oven.
Wet batters. Beer batter, tempura batter, anything liquid — it drips through the basket grate before it sets. You'll end up with a mess at the bottom and uncoated food on top. If you want fried-style coating in an air fryer, use dry breading: flour, egg wash, panko. That works well.
Anything cheese-heavy on top. Casseroles with melted cheese topping work in an oven because the cheese melts gradually. In an air fryer, the intense top-down heat scorches the cheese before the dish underneath heats through. If you must, cover with foil for 75% of the cook time, then uncover to brown.
Preheating Matters More Than You Think
Most oven recipes assume you've preheated. The same applies to air fryers, but the impact is bigger.
I tested this with frozen french fries. Same batch, same temperature (400°F), same time (15 minutes). One batch went into a preheated air fryer, the other into a cold start. The preheated batch was golden and crispy. The cold-start batch was pale and limp on the outside, overdone in the middle — it spent the first 4-5 minutes just heating the machine instead of cooking.
Preheat for 3-5 minutes at the cooking temperature. It takes almost no energy and makes a noticeable difference in browning and texture. The only exception is delicate foods like fish fillets that cook so fast they might overcook on the outside — for those, a cold start can actually help.
Single Layer Is Not Optional
This is the rule people ignore most, and it's the main reason air fryer results disappoint.
An air fryer works by blowing hot air around every surface of the food. When you pile food in layers, the bottom pieces steam instead of crisping. I've measured the difference: a single layer of fries at 400°F for 15 minutes reaches 350°F surface temperature (crispy). A double-stacked batch at the same settings reaches only 280°F surface temperature on the bottom layer (soggy).
Yes, cooking in batches is annoying. But two batches of crispy food beats one batch of half-crispy, half-steamed food. If batch cooking is a problem, consider upgrading to a larger capacity air fryer — the 5-6 quart models have enough basket space for most family portions in a single layer.
Flipping and Shaking: When and Why
Not every food needs flipping, but most benefit from it.
Shake the basket for small, loose items: fries, tater tots, Brussels sprouts, cauliflower. Shaking redistributes them so pieces that were on the bottom get exposed to direct airflow. Once at the halfway mark is minimum — twice is better for larger batches.
Flip with tongs for larger, individual pieces: chicken breasts, pork chops, fish fillets, steaks. These have a distinct top and bottom that need direct heat exposure on both sides for even browning.
Skip flipping for things that are thin and flat (bacon), naturally one-sided (salmon with skin), or too delicate to handle (stuffed peppers, eggs).
Use the cooking time calculator to get reminders for when to flip based on your specific food and cooking time.
Oil: Less Is More
One of the biggest advantages of air frying is using less oil. But "less" doesn't mean "none."
A light spray of oil — about 1-2 teaspoons per batch — serves two purposes. First, it promotes browning through the Maillard reaction, which needs a thin fat layer to work properly at these temperatures. Second, it prevents sticking to the basket.
For vegetables, toss them in a bowl with half a teaspoon of oil and salt before air frying. For proteins, a light spray or brush on the surface is enough. Breaded foods that already have an egg wash usually don't need additional oil.
One warning: do not use cooking spray (like PAM) directly on non-stick air fryer baskets. The propellants in aerosol sprays damage the non-stick coating over time. Use a pump-style oil mister or brush the oil on by hand.
Converting Specific Recipe Types
Casseroles and Baked Dishes
Lower the temperature by 25-30°F and cover with foil for the first two-thirds of cooking time. Check the center with a thermometer — casseroles are denser and the middle takes longer. Most 9x13 baking dish recipes won't fit; use a small oven-safe dish that fits inside the basket with at least half an inch of clearance on all sides for airflow.
Roasted Vegetables
This is where air fryers genuinely outperform ovens. Cut vegetables into uniform pieces, toss with minimal oil, and cook at 375°F. Most vegetables finish in 8-15 minutes compared to 25-35 in an oven, and they come out crispier because the concentrated heat drives out moisture faster. The key: don't skip the oil, and don't crowd the basket.
Frozen Convenience Foods
Most frozen foods already have conversion instructions on the package for air fryers. If they don't, use the standard formula. Frozen foods generally need an extra 2-3 minutes compared to fresh because the food starts below room temperature. Don't thaw first unless the recipe specifically says to — going from frozen to hot is what gives you a crispy outside and moist inside. For a detailed frozen food reference, check our air fryer frozen food times guide.
FAQ
Can I use aluminum foil in an air fryer?
Yes, but with rules. Place foil in the basket only — never in the bottom drip tray where it can block airflow or contact the heating element. Don't cover the entire basket surface, because air needs to circulate through the holes. Foil is useful for messy foods like stuffed peppers or cheese-topped dishes. Parchment paper with holes (sold as "air fryer liners") is a better option for most uses.
Do I need to preheat every time?
For best results, yes. Preheating takes 3-5 minutes and significantly improves browning and crispiness. The exception is very delicate foods like thin fish fillets that might overcook on the outside. For quick reheating (pizza, leftovers), you can skip preheating without much difference.
Why is my air fryer food dry?
Three common causes: cooking too long (the 20% time reduction matters), not using any oil (a light spray makes a big difference), and overcrowding (steaming instead of crisping). For lean proteins like chicken breast, brining for 30 minutes before cooking or brushing with a thin layer of mayo before seasoning keeps moisture locked in.
Can I convert any oven recipe to air fryer?
Most recipes convert well, but some don't. Large roasts (over 3 pounds), wet-battered foods, and dishes requiring slow, even heat (like cheesecake or souffles) should stay in the oven. Anything that fits in a single layer and cooks at 325-450°F is a good candidate for conversion.
Next Steps
- Use the air fryer converter to instantly convert any oven recipe
- Check our air fryer temperature and time chart for settings on 60+ foods
- Try the cooking time calculator for precise timing based on your food and portion size
- Read the oven temperature conversion chart for Fahrenheit to Celsius conversions