How do I convert oven temperature to air fryer in Fahrenheit?
Subtract 25°F from the oven temperature. For example, 400°F oven becomes 375°F in the air fryer. Also reduce cooking time by about 20%.
Fahrenheit Conversion
Oven to Air Fryer Conversion Fahrenheit
If your recipe uses Fahrenheit — standard in US cookbooks and most American recipe sites — the oven-to-air-fryer conversion follows a clear rule: subtract 25°F and reduce cooking time by 20%. This page covers that rule in detail, shows the full Fahrenheit temperature table, and explains the one situation where the rule needs adjustment: convection ovens.
Quick Answer
For Fahrenheit oven recipes, subtract 25°F from the oven temperature and reduce cooking time by about 20%. So 400°F in the oven becomes 375°F in the air fryer, and 30 minutes becomes about 24 minutes. This rule applies to standard (conventional) oven recipes — not convection oven recipes.
- Fahrenheit rule: air fryer temperature = oven temperature minus 25°F.
- Time rule: multiply oven time by 0.8 (20% reduction).
- This applies to conventional oven recipes, not convection oven recipes.
- If your oven recipe was already written for a convection oven, reduce by only 10–15°F.
Mini Converter
The calculator is set to Fahrenheit mode and prefilled with 400°F for 30 minutes — the most common benchmark in oven-to-air-fryer conversion.
°F
mins
Air Fryer Settingsfor general
Recommended Temperature
375°F
Cooking Time
22–25mins
Why this conversion
Applied the standard 20% time reduction and 25°F temperature drop.
Shake / Flip
Shake or flip around 12 minutes for even crisping.
Doneness check
Check early and add 2–3 minutes if needed.
* Air fryer models vary. Always check food early and use a food thermometer for meats.
The 25°F Fahrenheit Conversion Rule
The 25°F reduction is a practical kitchen consensus — not a lab-derived formula. It works because an air fryer operates like a powerful mini convection oven: the heating element is close to the food, the chamber is small, and the fan moves air aggressively. The net effect is that food surfaces see more direct heat than in a conventional oven at the same temperature setting.
The 25°F reduction compensates for this by starting the air fryer at a lower temperature. Combined with a 20% time reduction, the result is food that finishes in less time without over-browning. Most cooks find this rule accurate for a wide range of recipes — from roasting meats and vegetables to crisping frozen foods.
The exception is convection oven recipes. A convection oven already uses a fan to circulate air, so its recipes are often written at temperatures 25°F lower than a conventional oven recipe for the same food. If your recipe says 'convection oven at 375°F,' it's already compensated for the fan effect. For an air fryer, you may only need to reduce by 10–15°F rather than the full 25°F.
Oven to Air Fryer Fahrenheit Conversion Table
This table applies to conventional oven temperatures. If your recipe specifies a convection oven, the air fryer setting may be 10–15°F higher than shown.
| Conventional Oven (°F) | Air Fryer Starting Temp (°F) | Common Use |
|---|---|---|
| 300°F | 275°F | Gentle reheating, delicate baking, low-temperature cooking |
| 325°F | 300°F | Muffins, tender baked goods, cookies |
| 350°F | 325°F | Cookies, breads, casseroles, reheating |
| 375°F | 350°F | Chicken, vegetables, pork, general roasting |
| 400°F | 375°F | Wings, potatoes, frozen snacks, most recipes |
| 425°F | 400°F | Fries, bacon, high-heat crisping |
| 450°F | 425°F | Short searing only; verify your air fryer's max temp |
| 475°F | 450°F | Very rare in home cooking; max temp check required |
| 500°F | 475°F | Artisan breads, pizza; most air fryers cannot reach this |
Common Oven Fahrenheit to Air Fryer Examples
| Oven Instruction | Air Fryer Starting Point | Notes |
|---|---|---|
| 350°F for 30 minutes | 325°F for about 22–25 minutes | Good for baked goods and gentle cooking. |
| 375°F for 25 minutes | 350°F for about 18–21 minutes | Chicken thighs, salmon, dense vegetables. |
| 400°F for 30 minutes | 375°F for about 22–25 minutes | The most common conversion; works for most foods. |
| 425°F for 15 minutes | 400°F for about 10–13 minutes | Fast crisping; check earlier than the estimate. |
| 450°F for 10 minutes | 425°F for about 7–9 minutes | Short searing; check at 7 minutes. |
Practical Tips
- Apply both the 25°F temperature reduction and the 20% time reduction together — using only one of them is a common mistake.
- If your recipe says 'convection oven,' reduce by only 10–15°F instead of 25°F.
- The 25°F rule works for most standard recipe temperatures. At the extremes (below 325°F or above 450°F), verify whether your air fryer can maintain those temperatures.
- For the first time converting a specific recipe, check 2–3 minutes before the converted time estimate.
- Use whole-number temperature settings that match your air fryer's available presets; the 25°F reduction gives you the exact right target for most common temps.
- Write down the settings that worked. The 25°F rule is accurate on average, but your specific air fryer model may run slightly hotter or cooler.
Common Mistakes to Avoid
- Using 25°C instead of 25°F as the reduction. These are different units; 25°C is a much larger reduction.
- Applying the 25°F rule to a convection oven recipe. Convection recipes already compensate for fan heat.
- Reducing temperature by 25°F but not reducing the time. Both changes are part of the conversion.
- Assuming the converted temperature is guaranteed to work. It's a starting point that works for most recipes, not every single one.
- Not checking early on the first attempt. The converted time is an estimate, not a timer you can walk away from.
Fahrenheit Conversion and Food Safety
Converting the oven temperature from Fahrenheit tells you where to set the air fryer — not when the food is safe to eat. For meat, poultry, and fish, always verify internal temperature with a food thermometer regardless of what the timer says.
The USDA safe minimum internal temperatures remain unchanged: poultry at 165°F, pork and beef at 145°F (medium), and fish at 145°F. These temperatures apply equally whether you cooked in the oven or the air fryer.
FAQ
What is 400°F oven in air fryer Fahrenheit?
A 400°F conventional oven recipe converts to about 375°F in the air fryer.
Is 25°F the same reduction as 25°C?
No. 25°F and 25°C are different amounts. The Fahrenheit air fryer rule is to reduce by 25°F. The Celsius rule is to reduce by about 15°C. Do not mix the numbers.
Does the 25°F rule apply to convection oven recipes?
No. Convection oven recipes are already written at lower temperatures to account for fan heat. For air fryer conversion from a convection oven recipe, reduce by only about 10–15°F instead of 25°F.
What if my air fryer temperature is between two settings?
Round to the nearest available setting. The 25°F rule gives you the ideal target; being 5°F above or below rarely makes a significant difference.