That 350°F Casserole Won't Work in Your Air Fryer, Yet
You've got a recipe you love, but it was written for a conventional oven. Your air fryer cooks differently, hotter, faster, with circulating heat. Simply plugging in the same temperature and time will char the outside while leaving the inside underdone. You need to adjust. But how much?
What This Calculator Does
This air fryer conversion calculator instantly adjusts oven recipes to air fryer settings. You input the original oven temperature and cooking time, and the calculator gives you the corrected air fryer temperature (typically 25°F lower) and adjusted time (usually 20–25% shorter). It handles the physics of convection cooking so you don't have to guess, and your results come out golden and cooked through every time.
How to Use This Calculator
Start with your original recipe's oven temperature and cooking time. These two numbers are your starting point, if a recipe says "bake at 375°F for 40 minutes," enter exactly those values.
The calculator reduces the temperature by 25°F. This compensates for the air fryer's more intense, concentrated heat. Then it multiplies the cooking time by 0.75 to 0.80, cutting roughly 20–25% off the total time.
Here's the critical part: these are starting points, not absolutes. Air fryer models vary slightly in how aggressively they cook, and the size and thickness of your food matter enormously. A thin chicken breast cooks much faster than a thick one. Dense vegetables need more time than delicate ones.
Check your food at the suggested time. Open the basket, look inside. If it's not done, add 2–3 minutes and check again. If it's browning too fast, lower the temperature by 5°F next time. This way you'll learn your specific air fryer's personality, and within a few uses, you'll adjust recipes by instinct.
The Formula Behind the Math
Air fryers work by rapid air circulation around food at very high temperatures. A traditional oven heats the air in the cavity; an air fryer heats you the food directly and intensely. This means:
Temperature adjustment: Air fryer temp = Oven temp − 25°F
Time adjustment: Air fryer time = Oven time × 0.75 to 0.80
Let's work through an example. You have a meatloaf recipe that calls for 375°F for 50 minutes in a standard oven.
The reason for the temperature drop is that air fryer heating elements sit closer to the food and heat it more aggressively. Running it at full oven temperature would create uneven cooking and browning. The time reduction reflects faster heat transfer. Your air fryer doesn't have to warm up a massive oven cavity, it goes straight to work on your chicken thighs.
One variable to watch: moisture and coverage. Covered or sealed foods (in a small baking dish) take longer than uncovered items. Crowded baskets cook unevenly. A single layer of food cooks faster than a stacked pile. Our calculator does all of this instantly, but now you understand exactly what it's computing.
Baked Goods and Pastries
Cookies, brownies, and quick breads respond well to air fryer conversion. Reduce the oven temperature by 25°F and cut the time by 20%. Check at the 70–75% mark because delicate items like cookies can go from golden to burnt in 60 seconds once they hit that stage. For sheet cakes, you may need a slightly lower temperature (350°F instead of 375°F) to prevent the top from browning before the center cooks through. Use a toothpick test: it should come out with just a few moist crumbs.
Roasted Vegetables and Crispy Items
This is where air fryers truly shine. Brussels sprouts, chicken wings, french fries, and roasted potatoes all come out extraordinarily crispy. When converting vegetable recipes, stick to the temperature reduction but start checking at the 75% time mark, vegetables often cook even faster than the standard formula suggests, especially if they're cut small. The air circulation crisps the outside beautifully, so you can often run slightly longer without drying out the inside. Toss your vegetables in oil and seasoning, spread them in a single layer, and let the air fryer do its work.
Dense Proteins and Root Vegetables
Whole chicken breasts, pork chops, and dense root vegetables like beets or turnips may need slightly more time than the formula predicts. Start at the calculated time, but don't be surprised if you add 5–10 minutes. The surface browns quickly, but the center needs time. Use a meat thermometer to confirm doneness: chicken 165°F, pork 145°F, beef steaks 125–145°F depending on your preference. For root vegetables, a fork should pierce easily when they're done.
Tips and Things to Watch Out For
Always leave space in the basket. A crowded air fryer cooks unevenly. Food on top cooks faster than food on bottom. If you're cooking a large batch, do two batches or work in a larger air fryer model.
Don't skip the preheating step. Many recipes benefit from a 2–3 minute preheat. This brings the air fryer to full heat before food enters, ensuring consistent, faster cooking from the start.
Oil matters. Most foods benefit from a light coating of oil, just a brush or spray. Oil helps browning and prevents sticking. Thin, dry foods (like fish fillets) may stick without it.
Shake or turn halfway through. For items that benefit from it (french fries, chicken wings, diced vegetables), shake the basket or flip items at the midway point. This ensures even cooking and browning on all sides.
Gas mark ovens are trickier to convert. If your recipe uses gas marks, convert to Fahrenheit or Celsius first using a standard oven temperature chart, then apply the air fryer adjustment.
Frequently Asked Questions
Can I use the same time for all air fryer foods?
No. Thin, high-moisture foods (fish, thin-sliced vegetables) cook much faster than dense, dry foods (root vegetables, thick roasts). Always check early, especially with new recipes.
What if my air fryer is overcooking food?
Lower the temperature by 5–10°F for your next attempt. Air fryer models vary; some run hotter than others. Once you find your model's sweet spot, you'll adjust recipes by feel.
Can I bake bread or dough in an air fryer?
Yes, but expect adjustments. Small rolls and loaves work well at reduced temperatures (around 330–350°F). Larger loaves need more time. Pastry doughs and laminated doughs (croissants, Danish) can work, but the smaller cooking space limits size.
Should I use parchment paper in my air fryer?
Yes, and it's helpful. Cut it to fit your basket, place food on top, and secure one corner under the food so it doesn't blow around. This prevents sticking and makes cleanup easier.
How do I know when air fryer food is actually done?
Use visual cues and a meat thermometer. For chicken, pork, and fish, internal temperature is your gold standard. For vegetables, color and fork-tenderness work. For baked goods, a toothpick should come out mostly dry.
Can I cook frozen foods without thawing?
Yes. Frozen foods typically need 5–10 minutes extra cooking time but no temperature adjustment. Frozen fries cook beautifully; frozen chicken breasts take longer but come out juicy if you use a thermometer.
Related Calculators
Use our oven temperature converter if your recipe calls for gas mark temperatures. Our meat cooking time calculator helps ensure your air fryer proteins are cooked to safe internal temperatures. The defrost time calculator can help you safely thaw foods before air frying if you prefer starting from thawed.