Oven Temperature Converter
°C, °F, gas mark and fan — all four at once.
°C, °F, gas mark and fan — all four at once. Convert between Celsius, Fahrenheit and gas mark, with the fan-oven setting alongside.
Conventional oven
180 °C
356 °F · gas mark 4 · fan 160 °C
The fan setting is 20 °C below the conventional one, which is the standard British and European adjustment. A fan circulates hot air, so it cooks faster at the same dial reading — following a conventional recipe temperature in a fan oven is the usual cause of a dark outside and an underdone middle. Gas marks are not evenly spaced. Marks 1 to 6 step by 10 °C and the higher ones step by 20, so no single conversion formula works across the scale. This uses the published table. Oven thermostats drift, often by 10-20 °C. If bakes consistently run fast or slow, an oven thermometer settles it faster than adjusting recipes.
How the Oven Temperature Converter works
Convert between Celsius, Fahrenheit and gas mark, with the fan-oven setting alongside. Gas marks are not evenly spaced, so this uses the published table rather than a formula that would drift at the top of the scale.
Also known as: gas mark to celsius converter · fan oven conversion chart · 180c to f · oven temperature chart
Where to go next
The Oven Temperature Converter question rarely arrives on its own. These are the ones that usually come with it:
- Recipe Scaling Calculator — Ingredients scale. Temperature never does.
- Cooking Conversion Calculator — Kitchen volumes, and weight only when you give a density.
- Percentage Calculator — Every common percentage question in one place.
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Frequently asked questions
What is gas mark 4 in Celsius?
180 °C, or 356 °F. Gas mark 6 is 200 °C and gas mark 9 is 240 °C — the marks step by 10 °C up to mark 6 and by 20 °C above it, so no single formula covers the whole scale.
How do I convert a recipe for a fan oven?
Reduce the temperature by 20 °C. A fan circulates hot air so it cooks faster at the same dial setting, and using the conventional temperature is the usual cause of a dark crust over an underdone middle.
Should I also reduce the time for a fan oven?
Often by around 10%, though it varies by dish. Reduce the temperature first and check earlier than the recipe says rather than adjusting both blind.
Why does my oven not match the dial?
Thermostats drift, commonly by 10-20 °C, and few ovens are even throughout. An oven thermometer settles it in one bake and is worth more than adjusting every recipe by guesswork.
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