Oven Temperature Converter On-device
°C, °F and gas mark, with a fan setting.
Chart setting
Gas mark 4
Celsius 180 °C
Fahrenheit 350 °F
Exactly on the chart
Exact conversion: 356 °F
Oven charts round °C and °F separately to real dial numbers, so they don't match exactly. 180°C is charted as 350°F; the exact conversion is 356°F.
A fan oven usually needs about 20 °C less than a conventional one. That is a typical figure, not a rule — it varies by oven and by dish.
Quick reference chart
| Gas mark | °C | °F | Fan °C |
|---|---|---|---|
| 1/4 | 110 | 225 | 90 |
| 1/2 | 120 | 250 | 100 |
| 1 | 140 | 275 | 120 |
| 2 | 150 | 300 | 130 |
| 3 | 170 | 325 | 150 |
| 4 | 180 | 350 | 160 |
| 5 | 190 | 375 | 170 |
| 6 | 200 | 400 | 180 |
| 7 | 220 | 425 | 200 |
| 8 | 230 | 450 | 210 |
| 9 | 240 | 475 | 220 |
Convert oven temperatures between Celsius, Fahrenheit and UK gas marks using the standard published chart, with a fan/convection adjustment and the exact arithmetic conversion shown alongside it. Runs entirely on your device.
About this tool
What you provide
- A temperature in °C or °F, or a UK gas mark
- A fan / convection oven toggle
What you get
- The matching chart row in °C, °F and gas mark
- The exact arithmetic conversion, shown beside the charted figure
- A fan-oven setting about 20 °C below the conventional one
Limits
- Published oven charts round °C and °F separately to real dial numbers, so the pairing is a convention, not an exact conversion — 180 °C is charted as 350 °F while the exact conversion is 356 °F.
- A temperature falling between chart rows is matched to the nearest published row and labelled as such.
- The 20 °C fan reduction is a typical figure, not a rule — it varies by oven and by dish.
How to use it
Choose how to enter it
Press °C, °F or Gas mark; each mode keeps its own field, so switching never rereads 180 °C as 180 °F.
Enter the temperature
Type the temperature, or pick a mark from the gas list in gas mode.
Set the oven type
Press Conventional oven or Fan oven; the fan setting adds a figure about 20 °C below the conventional one.
Read the chart row
The result shows the gas mark, °C and °F together, says whether you landed exactly on the chart or on the nearest row, prints the exact arithmetic conversion beside the charted figure, and offers buttons to copy the result or the link.
Frequently asked questions
Why does 180C show as 350F and not 356F?
Oven charts round the Celsius and Fahrenheit columns separately to numbers that exist on a real dial, so the published pairing is a convention rather than an exact conversion. The tool shows the charted figure and the exact arithmetic conversion side by side so you can see the gap.
How much should I lower the temperature for a fan oven?
A reduction of about 20C is the usual starting point, and it is what the fan toggle applies. It is a typical figure, not a rule: ovens and dishes differ, so check your own oven and your recipe.
Can I convert from a gas mark?
Yes. You can enter Celsius, Fahrenheit or a gas mark, and the full chart from gas 1/4 to gas 9 is listed for reference. Temperatures between chart rows are matched to the nearest published row and labelled as such.