Oven temperature converter
Enter a temperature in Celsius, Fahrenheit or gas mark and PrepMate shows the rest, including the fan-oven setting. No more squinting at a printed chart taped inside the cupboard door.
Oven temperature chart
| Description | °C (conventional) | °C (fan) | °F | Gas mark |
|---|---|---|---|---|
| Very cool | 110 | 90 | 225 | ¼ |
| Cool | 130 | 110 | 250 | ½ |
| Warm | 140 | 120 | 275 | 1 |
| Moderate | 150 | 130 | 300 | 2 |
| Moderate | 160 | 140 | 325 | 3 |
| Moderately hot | 180 | 160 | 350 | 4 |
| Fairly hot | 190 | 170 | 375 | 5 |
| Hot | 200 | 180 | 400 | 6 |
| Very hot | 220 | 200 | 425 | 7 |
| Very hot | 230 | 210 | 450 | 8 |
| Hottest | 240 | 220 | 475 | 9 |
About oven temperatures
Ovens speak three different languages. British recipes lean on gas marks, most of Europe uses Celsius, and North American recipes use Fahrenheit — and increasingly every oven also has a fan setting that behaves like its own scale. Getting the number right is the difference between a golden bake and a burnt one, so a fast, reliable conversion is worth keeping close.
Celsius and Fahrenheit
These two convert with a fixed formula: Fahrenheit equals Celsius times nine-fifths plus thirty-two. So 180 °C becomes 356 °F, and a familiar 350 °F lands at about 177 °C. Ovens are not precision instruments, so rounding to the nearest handy number on the dial is completely normal.
What the fan setting means
A fan (or convection) oven circulates hot air, so food cooks faster and more evenly. The common rule of thumb is to set a fan oven about 20 °C lower than a conventional recipe temperature, which is the fan figure this tool reports. Check your appliance manual, since some manufacturers suggest a 25 °C drop instead.
How gas marks line up
Gas marks step in 25 °F increments from mark 1 at 275 °F upward, with the fractional ¼ and ½ marks covering the lowest settings. Because they are a coarse scale, a converted temperature snaps to the nearest mark rather than giving a decimal. Gas mark 4 at 350 °F is the classic all-purpose baking setting.
Frequently asked
What is 350 °F in Celsius?
About 177 °C, most commonly rounded to 180 °C on an oven dial. In fan-oven terms that's roughly 160 °C, and it corresponds to gas mark 4.
How do I convert to a fan oven?
Lower the conventional temperature by about 20 °C. So a recipe calling for 200 °C conventional becomes roughly 180 °C on a fan setting. This tool shows the fan figure automatically.
What temperature is gas mark 6?
Gas mark 6 is 400 °F, which is 200 °C conventional or about 180 °C fan. It's a good hot setting for roasting vegetables and pastry.
Why does the gas mark say "approximately"?
Gas marks are a stepped scale rather than a continuous one, so any Celsius or Fahrenheit value is matched to the closest mark. Exact temperatures between marks simply round to whichever is nearest.
Is the fan adjustment always 20 degrees?
It's the widely used rule, but not a law. Some ovens run hotter or cooler and a few makers recommend a 25 °C reduction. Use it as a starting point and trust your eyes and a thermometer.
Does this send my data anywhere?
No. The conversion is pure browser JavaScript. Nothing is uploaded or logged, and the page keeps working with the connection switched off.