The quick answer: 350°F is 177°C, or gas mark 4, the moderate oven most baking uses. The oven temperature converter turns any temperature into Fahrenheit, Celsius, gas mark and the fan-oven setting at once, and the chart below covers the common points.
Full conversion chart
| Fahrenheit | Celsius | Fan °C | Gas mark | Description |
|---|---|---|---|---|
| 275°F | 140°C | 120°C | 1 | Very cool |
| 300°F | 150°C | 130°C | 2 | Cool |
| 325°F | 160°C | 140°C | 3 | Warm |
| 350°F | 180°C | 160°C | 4 | Moderate |
| 375°F | 190°C | 170°C | 5 | Moderately hot |
| 400°F | 200°C | 180°C | 6 | Hot |
| 425°F | 220°C | 200°C | 7 | Hot |
| 450°F | 230°C | 210°C | 8 | Very hot |
| 475°F | 240°C | 220°C | 9 | Very hot |
The Celsius figures are rounded to the values printed on oven dials, so 350°F shows as 180°C here even though the exact conversion is 177°C.
Converting Fahrenheit and Celsius
The exact relationship is a straight formula. To go from Fahrenheit to Celsius, subtract 32 and multiply by five-ninths. To go the other way, multiply by nine-fifths and add 32. For a rough mental version, double the Celsius and add 30 to estimate Fahrenheit. The oven temperature converter does the exact maths and rounds it to a sensible dial setting.
The fan-oven rule
A fan, or convection, oven moves hot air around the food, so it cooks faster and browns more at the same dial setting. The common rule is to set a fan oven about 20°C lower than a conventional recipe calls for. So a recipe written for 180°C conventional becomes about 160°C fan. Recipes are usually written for conventional ovens unless they say otherwise, so lower the temperature if yours has a fan and check the food a few minutes early.
Gas marks
Gas marks are the numbered settings on gas ovens, running from a quarter up to nine. Each step is roughly 14°C, so the scale is even. Gas mark 4 at 180°C is the baking workhorse, gas mark 6 at 200°C is for roasting, and gas mark 1 at 140°C is for slow cooking.
Convert any temperature
Enter a value in any scale into the oven temperature converter and read the rest. If you are moving a recipe to an air fryer, see how to convert an oven recipe to air fryer.