Gas mark to Celsius converter
British recipes sometimes give only a gas mark; pick it to see the temperature to set in Celsius.
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How to use it
- Enter gas mark.
- 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
From mark 1 up, °F = 250 + 25 × gas mark; mark 1/2 = 250 °F and 1/4 = 225 °F. °C = (°F − 32) × 5/9.
Example
Inputs: Gas mark = Gas mark 6 (400°F). Result: Temperature in Celsius: 204.4 °C; Temperature in Fahrenheit: 400 °F.
Limits and caveats
- The result is for a conventional oven; a fan oven is usually set about 20 °C lower.
- Recipes round Celsius, so gas mark 9 may appear as 240 °C while it is 246.1 °C.
Questions about this tool
What is gas mark 4 in Celsius?
350 °F, which is 176.7 °C and usually written as 180 °C in recipes.
What is gas mark 6 in Celsius?
400 °F, which is 204.4 °C and usually rounded to 200 °C.
Can I use this temperature in a fan oven?
The figures are for a conventional oven. In a fan oven go about 20 °C lower or follow the oven manual.