Gas Mark 4
Gas mark 4 is a moderate oven:
180 °C
Conventional oven
350 °F
Fahrenheit
Fan-forced ovens run about 20 °C hotter than conventional at the same dial setting, so gas mark 4 is 160 °C with the fan on. See the full oven temperature conversion chart.
Gas mark 4 is the workhorse setting of British home baking — the "moderate oven" that Victoria sponges, most traybakes, roast chicken and shepherd's pie are all written for. If a UK recipe gives no temperature at all and just says "moderate oven", this is the setting it means.
Gas Mark 4 conversion table
| Gas mark | Gas mark 4 |
| Conventional oven (°C) | 180 °C |
| Fahrenheit (°F) | 350 °F |
| Fan-forced / convection | 160 °C |
| Oven description | Moderate |
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Frequently asked questions
What temperature is gas mark 4?
Gas mark 4 is 180 °C in a conventional oven, or 350 °F. In a fan-forced (convection) oven, set 160 °C instead.
Is gas mark 4 the same as 180 degrees?
Yes — gas mark 4 and 180 °C are the same oven setting. The two scales line up exactly at this point, which is why 180 °C is the most commonly quoted equivalent.
What is gas mark 4 in a fan oven?
Set a fan oven to 160 °C. Fan ovens circulate hot air and cook roughly 20 °C hotter than a conventional oven at the same dial setting, so you drop the temperature by about 20 °C to match.
Is gas mark 4 a moderate oven?
Yes. Gas mark 4 (180 °C / 350 °F) is the classic "moderate oven" of British recipe writing — hot enough to brown and rise, gentle enough not to catch before the centre cooks.