Air Fryer Conversion Calculator

Subtract 25 °F (or 15 °C) from the temperature called for in the recipe and multiply the cooking time by 0.8 (a 20 % reduction). For example, a recipe calling for 400 °F for 30 minutes becomes 375 °F for 24 minutes in the air fryer. Always check food a few minutes early and confirm doneness with a food thermometer.

An air fryer is a compact convection oven — a built-in fan circulates hot air around the food at high velocity. This more efficient heat transfer means the same nominal temperature cooks food faster and can over-brown the exterior before the interior is done, so reducing the set temperature by 25 °F (15 °C) compensates for the increased efficiency.

No — the 25 °F (15 °C) reduction is a widely agreed-upon starting rule of thumb, but actual results depend on the wattage, basket size, and fan speed of your specific model. Some sources cite reductions of up to 35 °F. Treat the converted temperature as a starting estimate and adjust based on your first cook.

The common rule is a 20 % reduction in cooking time. For a 30-minute recipe, that is 6 minutes saved (24 minutes total). For a 60-minute recipe, it is 12 minutes saved (48 minutes). Some sources cite up to 25–30 % for longer or larger items. The calculator lets you adjust this percentage between 10 % and 30 %.

Yes. Subtract 15 °C from the Celsius temperature and reduce the time by your chosen percentage. Note that 15 °C is a fixed, independently agreed-upon offset — it is not a mathematically exact conversion of the 25 °F offset (which would be 13.9 °C). Both values are widely cited conventions for their respective unit systems.

Not necessarily. The converted time is an estimate based on the rule of thumb, and 'done on the timer' does not equal 'food-safe.' Always verify doneness with a food thermometer against USDA safe minimum internal temperatures: poultry must reach 165 °F (74 °C), ground meats 160 °F (71 °C), and whole beef, pork, veal or lamb cuts 145 °F (63 °C) followed by a 3-minute rest.

Pre-packaged meals already have manufacturer-tested settings for air fryers. This calculator is intended for converting conventional oven recipes — it may not apply to frozen meals with specific air fryer instructions on the packaging. For frozen foods without dedicated instructions, the 25 °F / 20 % rule can serve as a starting point, but check the manufacturer's guidance first.

Do not apply the offset a second time. Convection oven recipes have already been adjusted for fan-assisted cooking. Applying the 25 °F reduction again would result in undercooked food. This calculator is designed exclusively for recipes written for a conventional (still-air) oven.

The time reduction is not a fixed law — sources cite 20 % as the most common rule but note up to 25–30 % for longer or denser items. Exposing the percentage lets you apply a more aggressive reduction for a whole chicken (closer to 25–30 %) versus a shorter recipe like chips or fries (20 % is usually appropriate).

Yes. Air fryers typically use 1,400–1,700 W but heat up rapidly and cook faster than a full-size oven (which can draw 2,000–5,000 W). The combination of lower wattage and shorter cook time generally makes air fryers more energy-efficient for small meals, though the energy saving depends on both the wattage of your specific appliance and how much shorter the cook time actually is.

It depends on the model, but most basket-style air fryers reach cooking temperature in 2–4 minutes — far quicker than a conventional oven. Some models preheat automatically; others work well without explicit preheating for shorter recipes. For best browning results, especially with fries or chicken pieces, a brief 3-minute preheat is worthwhile. Check your manual, and add 1–2 minutes to the air fryer time from this calculator if you skip preheating.

Both types use the same convection principle, so the 25 °F (15 °C) temperature reduction and 20 % time reduction apply to either as a starting point. That said, oven-style air fryers (which look like a small countertop oven with a rack) typically have a larger interior volume, which can mean slightly less intense airflow around the food. If you have an oven-style model, treat the conversion as a starting estimate and check doneness a few minutes early on your first cook.

The intense, top-down heat in many air fryer baskets can over-brown cakes, muffins, and bread before the centre sets. Two reliable fixes: (1) tent the item loosely with a small piece of aluminium foil for the last few minutes to shield the top, and (2) reduce the temperature a further 10–15 °F below the 25 °F reduction you have already applied and extend the time slightly. Monitor closely — baked goods in an air fryer are faster and less forgiving than in a full oven.

For small, loose items — fries, potato chunks, chickpeas, cubed vegetables — shake the basket halfway through cooking so all surfaces get direct airflow and brown evenly. For larger pieces like chicken thighs, salmon fillets, or pork chops, flip them once at the midpoint instead of shaking. Dense items like meatballs or whole sausages also benefit from a flip. Baked goods and casseroles that need to hold their shape should not be shaken or flipped.

Most air fryers cap out at 200 °C (400 °F) or thereabouts. If the recipe calls for, say, 475 °F (245 °C) and your converted temperature is 450 °F (230 °C) — above your model's limit — set the appliance to its maximum and reduce the cooking time by an additional 10–15 %. The higher actual temperature means food cooks faster than the formula predicts, so start checking for doneness well before the calculated time and use a thermometer to confirm.