Conventional to fan oven temperature
A fan oven moves heat faster, so the recipe temperature is usually lowered. Enter the recipe temperature to see what to set.
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How to use it
- Enter recipe temperature (conventional), temperature unit and difference (leave empty for the usual value).
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Fan temperature = recipe temperature − difference; the usual difference is 20 °C or 25 °F.
Example
Inputs: Recipe temperature (conventional) = 200, Temperature unit = Celsius (°C). Result: Fan oven temperature: 180 °C; In the other unit: 356 °F; Difference used: 20 °C.
Limits and caveats
- The 20 °C rule is common guidance, not a law, and some modern ovens adjust automatically, so check your manual.
- Baking time may be a little shorter with a fan, so check a few minutes early.
Questions about this tool
What is 180 °C conventional in a fan oven?
About 160 °C, using the usual 20 degree reduction.
Why lower the temperature with a fan?
The fan moves hot air around the food and transfers heat faster, so 160 °C with a fan bakes much like 180 °C without.
Is the rule the same in Fahrenheit?
American recipes usually drop 25 °F for convection ovens.