Oven-to-Air-Fryer Calculator

An air fryer is essentially a small, very efficient convection oven. The fan moves hot air at high velocity directly across the food's surface, transferring heat dramatically faster than a conventional oven where air just sits and warms up.

That faster heat transfer means two things: the surface browns faster (so you need a lower temperature to prevent burning), and the food cooks through faster (so you need less time). The conventional rule is "−25°F, −20% time" — but that's a starting point, not a universal law.

Different food types cook differently in an air fryer. Frozen foods don't need a temp drop because the surface stays cool until the inside thaws. Baked goods need a bigger temp drop because crusts brown faster than centers can rise and set. The calculator above adjusts for these.

Air fryers vary enormously by brand and size. Two 5-quart air fryers from different brands can finish the same chicken thigh 20% apart. The big variables:

Wattage: Higher-wattage fryers (1700W+) cook noticeably faster than lower-wattage ones (1200W).

Basket vs. oven style: Basket fryers heat from above with the food in a perforated basket. Oven-style models often have multiple racks and longer airflow paths — they cook slower.

Basket size and load: A half-full basket cooks faster than a full basket because air can move around food. The same recipe doubled often takes 30%+ longer.

Preheat: Most charts assume a preheated basket. Skipping preheat adds 2–4 minutes.

Practical fix: Check at the halfway mark every time, and write down the actual setting that worked for your specific air fryer. Build your own cheat sheet over time.

Baking is the hardest thing to convert because the air fryer's biggest strength (rapid surface browning) is a baked good's biggest weakness. Cookies, cakes, and muffins need time for the leavening (eggs, baking powder, baking soda) to work and the structure to set. If the surface browns too fast, the outside is burnt before the inside is risen.

The fix is two-pronged: drop the temp by 50°F (not just 25°F) and use smaller portions. A 9-inch cake won't bake properly in most air fryer baskets — but the same batter split between two 6-inch pans will. Cookies do beautifully in air fryers because they're small enough to cook through before the surface burns.

Always cover loaf cakes loosely with foil for the first half of the cook, then remove for the last few minutes to brown the top.

The widely-cited "20/20 rule" — drop oven temp by 25°F and reduce time by 20% — works fine for most savory recipes at moderate temperatures. It's where to start if you don't have a calculator handy.

This calculator goes further by adjusting for food category:

Meat / poultry: Standard 25°F drop, 20–25% time reduction. Always finish with internal temperature, not the timer.

Frozen foods: Keep oven temp the same (frozen surface stays cool while thawing), but cut time by 30–50%.

Baked goods: Drop temp by 50°F (not 25°F) and cut time 20%, because crusts brown too fast otherwise.

Vegetables: Standard 25°F, 20% time — but they often need a flip and oil spray to crisp instead of steam.

Seafood: Standard 25°F, 25–30% time reduction. Fish overcooks fast.

Reheating: 350°F flat, time depends on food type. The goal is restoring crispness without drying out.