Conventional to Fan Oven Converter

Understanding Conventional to Fan Oven

Fan ovens (also called convection ovens) circulate hot air using a fan, which transfers heat more efficiently than conventional (static) ovens. This means food cooks faster and more evenly, but you need to reduce the temperature by about 20°C to compensate. For example, 180°C conventional becomes 160°C fan. The circulating air also helps with browning and crisping.

When to Use Conventional to Fan Oven

Using a fan-assisted oven? Converting conventional oven temperatures to fan oven temperatures is essential. Fan ovens cook more efficiently, so you need to reduce the temperature to avoid overcooking or over-browning. This conversion is necessary when following older recipes or those from countries where conventional ovens are standard.

Practical Tips

This conversion is most important when following recipes written for conventional ovens but using a fan oven. Most modern ovens have a fan setting, and many recipes now specify both temperatures. When in doubt, reduce the conventional temperature by 20°C for fan ovens. Also reduce cooking time by about 10-15% and check doneness early. For more details, see our complete oven temperature guide.

Quick Tips

• Reduce conventional oven temperature by 20°C for fan ovens
• 180°C conventional = 160°C fan (most common baking temperature)
• 200°C conventional = 180°C fan
• Fan ovens may also cook faster, so check doneness a few minutes early

Common Mistakes to Avoid

The most common error is forgetting to reduce the temperature when using fan mode, resulting in over-browned or dried-out food. Another mistake is assuming all fan ovens behave identically — some have stronger fans than others, requiring more or less adjustment. Some people also forget that fan mode affects cooking time as well as temperature.

When Precision Matters

The 20°C reduction is a guideline, not an exact rule. For delicate baking like sponge cakes or soufflés, you might reduce by only 15°C and monitor closely. For roasting meat or vegetables, the full 20°C reduction works well. For bread, some bakers prefer conventional mode for better crust development. Always use an oven thermometer to verify actual temperature.