Celsius to gas mark converter
Type the oven temperature in Celsius to see the nearest gas mark, handy when your gas oven dial shows marks instead of degrees.
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How to use it
- Enter oven temperature.
- 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
°F = °C × 9/5 + 32. Gas mark 1 = 275 °F and each mark adds 25 °F; mark 1/2 = 250 °F and 1/4 = 225 °F. The nearest mark is chosen.
Example
Inputs: Oven temperature = 200 °C. Result: Nearest gas mark: 6; Temperature in Fahrenheit: 392 °F; Exact temperature of that mark: 204.4 °C.
Limits and caveats
- Recipes round Celsius to tens, so a printed table may differ by one mark at about 170 °C.
- Real gas ovens vary; an oven thermometer gives a truer reading.
Questions about this tool
What gas mark is 180 °C?
180 °C is 356 °F, and the nearest mark is gas mark 4, which is 350 °F or 176.7 °C.
What is a gas mark?
A British oven scale for gas cookers: gas mark 1 is 275 °F and each step up adds 25 °F, up to mark 10.
Why do some tables list 170 °C as gas mark 3?
Gas mark 3 is exactly 162.8 °C and some tables round it to 170. This tool picks the mathematically nearest mark, so 170 °C gives mark 4.