How to convert oven recipes to air fryer
Air fryers are compact convection ovens: a powerful fan circulates hot air right around the food at high speed. That intense airflow transfers heat far more efficiently than the still air inside a conventional oven, so the same recipe needs less heat and less time.
The widely used conversion rule is straightforward:
- Temperature: reduce by 20 °C (or 25 °F) compared with the oven temperature.
- Time: reduce by about 20% — multiply the oven time by 0.8 and round to the nearest minute.
For example, a recipe that calls for 200 °C for 30 minutes in a conventional oven becomes 180 °C for 24 minutes in the air fryer. The calculator above does this arithmetic for you instantly.
Why the −20 °C / −20% rule works
A conventional oven heats a large chamber and relies on radiant heat from top and bottom elements. An air fryer is much smaller and blows superheated air directly over the food's surface, mimicking the effect of deep-frying without the oil. That concentrated heat delivery means the outside browns quickly while the inside still has time to cook through — but only if you dial the temperature down slightly to avoid burning the exterior before the centre is done.
The 20% time reduction accounts for the smaller cavity (less air to heat) and the faster heat transfer. It's a starting point, not a guarantee: thicker cuts of meat, dense root vegetables, and frozen foods may need a few extra minutes, while thin items like fish fillets or spring rolls can finish even earlier.
What to watch when air frying
- Shake or flip halfway. Most air fryer baskets block airflow on the bottom side. Shaking fries or flipping chicken thighs halfway through ensures even browning.
- Don't overcrowd the basket. Stacking food blocks airflow and turns the air fryer into a steamer instead of a fryer. Cook in batches if needed.
- Check a few minutes early. Because of the efficiency gain, food can be ready 5–10 minutes sooner than the converted time suggests. Use a meat thermometer or visual check.
- Preheat for 2–3 minutes. Many air fryers benefit from a short preheat — especially for anything that needs a sear (steak, salmon) or a crispy shell (breaded items).
- Pat food dry. Excess moisture on the surface steams instead of crisps. Dab meat and vegetables with a paper towel before adding oil or seasoning.
More cooking tools from Swoodie
Once you have your air fryer temperature sorted, check the oven temperature converter if your recipe uses a scale you don't recognise (gas marks, Fahrenheit, fan settings). Need to confirm the inside of your chicken is safe? The safe cooking temperatures chart lists USDA minimum internal temperatures for every protein. And if you want to keep all your converted recipes — timings, temperatures, and ingredients — in one place, Swoodie stores everything so nothing gets lost mid-cook.
Every air fryer model is different. Wattage, basket size, and fan speed all affect actual cooking times. Use this converter as a reliable starting point and adjust by ±5 minutes based on your appliance's behaviour.
Frequently asked questions
How do I convert oven temperature to air fryer?
Reduce the oven temperature by 20 °C (or 25 °F). So a recipe calling for 200 °C in a conventional oven becomes 180 °C in the air fryer. The calculator above applies this instantly — just enter your oven temperature and select your unit.
How much do I reduce cooking time for an air fryer?
Reduce the oven cooking time by about 20% — multiply the oven minutes by 0.8. A 30-minute oven recipe becomes roughly 24 minutes in the air fryer. Always check a few minutes before the converted time is up, especially for thinner pieces of food.
Can I convert any oven recipe to an air fryer?
Most dry-heat oven recipes — roasted vegetables, chicken pieces, fish fillets, chips, breaded items, and many baked goods — convert well. Recipes that rely on steam (like custards or bread in a covered pot) or very large joints that need long slow roasting are harder to adapt. Casseroles and liquid-heavy dishes also need special equipment or technique.
Do I need to preheat an air fryer?
For most recipes, a 2–3 minute preheat improves results, especially for items that benefit from an immediate sear (steak, fish) or a crispy coating (breaded chicken, spring rolls). Some newer air fryer models heat up so quickly that preheating adds minimal benefit — check your appliance's manual.
Why is my air fryer food burning on the outside but raw inside?
This usually means the temperature is too high or the pieces are too thick for the converted time. Try dropping the temperature by a further 10 °C and extending the time slightly, or cut thicker pieces in half. Flipping or shaking halfway through also helps distribute heat more evenly.