Gas mark 4 in an electric fan oven is approximately 160°C (320°F), which is a moderate oven temperature.

Quick Scoop

  • Gas mark 4 ≈ 180°C in a conventional electric oven.
  • For a fan (convection) oven, you usually reduce the temperature by about 20°C, so you set it to about 160°C instead.
  • In Fahrenheit, that’s about 320°F for a fan oven, versus 350°F for a conventional oven.

Simple mini table (fan vs non‑fan)

html

<table>
  <tr>
    <th>Setting type</th>
    <th>Temperature</th>
    <th>Notes</th>
  </tr>
  <tr>
    <td>Gas mark 4 (reference)</td>
    <td>≈ 177–180°C / 350°F</td>
    <td>Moderate/medium oven.[web:3][web:7]</td>
  </tr>
  <tr>
    <td>Electric conventional oven</td>
    <td>≈ 180°C / 350°F</td>
    <td>Typical conversion from gas mark 4.[web:1][web:5]</td>
  </tr>
  <tr>
    <td>Electric fan oven</td>
    <td>≈ 160°C / 320°F</td>
    <td>Usually 20°C lower than conventional.[web:5][web:7]</td>
  </tr>
</table>

Quick usage tip

If a recipe says “Gas mark 4” and you’re using a modern electric fan oven, set it to about 160°C and start checking for doneness a little earlier than the recipe time, since fan ovens can cook slightly faster.

Information gathered from public forums or data available on the internet and portrayed here.