How do I convert a conventional oven temperature for a fan oven?

As a rule of thumb, set a fan (convection) oven about 20 °C lower than the conventional temperature shown, since fans circulate heat more efficiently.

What is gas mark 4 in Celsius?

Gas mark 4 is 180 °C (about 350 °F), a common moderate baking temperature.

Does this send my data anywhere?

No. All conversions run locally in your browser with no network requests.

Oven Temperature Converter

Convert oven temperatures between °C, °F and gas mark.

Oven temperature converter — °C, °F and gas mark

Convert any oven temperature between Celsius, Fahrenheit and gas mark at a glance. Enter a temperature in any unit and all three equivalents update instantly, with a reminder to drop fan-oven settings by about 20 °C.

Everything runs in your browser — no uploads, no tracking.