Oven to Air Fryer Conversion: Temperature & Time Chart
How to convert any oven recipe's temperature and cook time to air fryer settings, with a full chart and the reasoning behind the -20°C / -20% rule.
Air fryers are compact convection ovens: a heating element and a fan force hot air around a small basket at close range, so the same nominal temperature cooks food noticeably faster than a full-size oven. Following an oven recipe's time and temperature exactly in an air fryer almost always overcooks or burns the outside before the inside catches up. The fix is a simple, well-tested adjustment — drop the temperature by about 20°C (25°F) and cut the time by roughly 20% — but the right amount varies a little by food type, thickness, and how full the basket is. This guide covers the conversion math, a chart for common foods, and the adjustments that make the difference between guessing and getting it right the first time.
The Core Conversion Rule
Lower the oven's stated temperature by about 20°C (25°F), and reduce the stated cook time by around 20%. A recipe calling for 200°C (400°F) for 30 minutes becomes roughly 180°C (375°F) for 24 minutes in the air fryer. This works because the air fryer's small chamber and aggressive air circulation transfer heat to the food's surface far faster than a large oven cavity, where heat has more air to move through and more distance to travel before it reaches the food.
💡 Tipp: Always treat the converted time as a check-early estimate, not a fixed endpoint — pull the basket out a few minutes before the calculated time on your first attempt with any recipe.
Conversion Chart for Common Foods
Frozen fries: oven 220°C/20-25 min → air fryer 200°C/15-18 min. Chicken thighs (bone-in): oven 200°C/40-45 min → air fryer 180°C/25-30 min. Salmon fillets: oven 200°C/12-15 min → air fryer 180°C/8-10 min. Roasted vegetables: oven 220°C/25-30 min → air fryer 200°C/12-15 min. Frozen chicken nuggets: oven 200°C/18-20 min → air fryer 180°C/10-12 min. Bacon: oven 200°C/15-20 min → air fryer 180°C/8-10 min. These are starting points — thinner cuts and smaller pieces finish faster, and a fuller basket slows everything down.
Why Basket Load Matters More Than Oven Load
A full sheet pan in an oven still has open space above and around it for hot air to circulate, so oven cook times barely change with load. An air fryer basket is a sealed loop — pile food more than one layer deep and you block the airflow that makes the appliance work, effectively turning it back into a slow, uneven regular oven. For anything meant to crisp (fries, wings, breaded cutlets), keep pieces in a single layer with visible gaps, and cook in batches rather than crowding the basket.
💡 Tipp: If a recipe serves four and your air fryer basket is small, plan on two batches rather than one crowded one — it's faster overall than a single soggy batch.
Preheating: Usually Worth 3-5 Minutes
Many air fryers heat up fast enough that skipping preheating barely matters for a 20-minute cook, but for anything meant to be crispy on the outside — battered, breaded, or high-fat foods — a 3-5 minute preheat at the target temperature gives a noticeably better crust. Preheating matters less for foods that cook a long time anyway (a whole chicken thigh) and matters more for foods that cook fast and rely on an immediate sear (thin-cut vegetables, frozen snacks).
Adjusting for Frozen vs Fresh Food
Air fryers excel at cooking from frozen — frozen fries, nuggets, and dumplings often cook in nearly the same time as their oven-frozen instructions, just at the lower air-fryer temperature, because the appliance's fast heat transfer largely offsets the extra time frozen food normally needs. Fresh, unfrozen versions of the same foods generally cook 20-30% faster than their frozen counterparts — cut times accordingly rather than assuming fresh and frozen behave the same.
What Doesn't Convert Well
Wet batters (tempura-style, thin pancake batter) don't hold together under an air fryer's forced airflow the way they do in a still oven or deep fryer — they can blow apart or dry out unevenly. Very large single items (a whole roast, a full-size cake) often don't fit the compact basket at all, or cook unevenly because the fan can't circulate air fully around them. For these, use the oven as written rather than forcing an air fryer conversion.
Häufig gestellte Fragen
Can I just use the oven temperature and time in an air fryer?
You can, but food usually overcooks on the outside before the inside is done, since the air fryer's compact chamber and forced air cook faster at the same nominal temperature. Dropping the temperature by about 20°C and the time by about 20% gets much closer to the right result.
Do all foods need the full 20% time reduction?
No — thin or small items (fries, nuggets, sliced vegetables) often need an even bigger reduction, while dense, thick cuts (bone-in chicken thighs, whole roasts) may only need 10-15% off. Treat 20% as a default starting point and adjust based on how the food looks a few minutes before the estimated time.
Why did my air fryer food turn out dry using the converted time?
Overcrowding the basket is the most common cause — it blocks airflow and forces food to cook longer than the calculator suggests, drying out the exterior before the center catches up. Check that food sits in a single layer with gaps between pieces, and cook in batches if needed.
Is air fryer cooking healthier than oven baking?
Nutritionally the two are very similar for the same food and amount of added oil — the main difference is that air fryers need much less (or no) oil to achieve a crisp texture that deep frying would otherwise require, which is where most of the calorie savings actually come from, not the appliance itself.
The -20°C / -20% rule gets an air fryer conversion close enough on the first try for the large majority of oven recipes — roasted vegetables, proteins, frozen convenience foods, and reheated leftovers all convert reliably. Keep the basket in a single layer, preheat for anything that needs a crisp exterior, and check a few minutes early until you've learned how your specific model runs. After a few conversions, the adjustment becomes intuitive enough that you won't need the chart at all.
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