Oven Temperature Converter
One dial, four languages: Fahrenheit, Celsius, fan-assisted Celsius and Gas Mark. Enter any temperature and see it in all four — 350°F is 180°C conventional, 160°C fan, Gas Mark 4.
Convert a temperature
Fan conversions use the standard rule: fan temperature = conventional Celsius − 20°C. Recipe Celsius figures are rounded to the nearest standard oven setting.
Oven temperature conversion chart
Every common baking temperature from 250°F to 500°F, in all four systems. Worth printing for the inside of a cupboard door.
| Fahrenheit (°F) | Celsius (°C) | Fan (°C) | Gas Mark | Typical use |
|---|---|---|---|---|
| 250°F | 120°C | 100°C | ½ | Slow drying, meringues |
| 275°F | 140°C | 120°C | 1 | Slow roasting, rich fruit cake |
| 300°F | 150°C | 130°C | 2 | Slow baking, cheesecake |
| 325°F | 170°C | 150°C | 3 | Delicate cakes, flans |
| 350°F | 180°C | 160°C | 4 | Most cakes and cookies |
| 375°F | 190°C | 170°C | 5 | Pastry, muffins, traybakes |
| 400°F | 200°C | 180°C | 6 | Roasting vegetables, scones |
| 425°F | 220°C | 200°C | 7 | Bread, pizza bases, roast potatoes |
| 450°F | 230°C | 210°C | 8 | Pizza, flatbreads |
| 475°F | 240°C | 220°C | 9 | Very hot pizza and bread ovens |
| 500°F | 260°C | 240°C | 10 | Maximum for most home ovens |
Frequently asked questions
What is 350°F in Celsius and Gas Mark?
350°F converts to 176.7°C exactly; recipes round this to 180°C for a conventional oven, which is Gas Mark 4 — the standard moderate oven used for most cakes. In a fan-assisted oven you would set about 160°C, because fan ovens run roughly 20°C hotter in effect than the dial suggests compared with a conventional oven at the same setting.
How much lower should a fan oven be than a conventional oven?
The standard rule is to reduce the conventional Celsius temperature by 20°C when using a fan-assisted (convection) oven — so 200°C conventional becomes 180°C fan. In Fahrenheit terms that is roughly a 25–30°F reduction. Some manufacturers suggest 10–15°C instead, so check your oven manual for critical bakes and treat the 20-degree rule as the reliable default.
What is Gas Mark 5 in Fahrenheit and Celsius?
Gas Mark 5 is 190°C in a conventional oven, which is 375°F. Gas marks are used mainly on British gas ovens: each whole mark above 1 adds roughly 10–15°C, starting from Gas Mark 1 at 140°C (275°F). Our converter lists every mark from ¼ to 9 alongside both temperature scales.
Why do converted temperatures not match my recipe book exactly?
Because published charts round to convenient numbers, and different publishers round differently. 325°F is exactly 162.8°C, but charts variously print 160°C, 165°C or 170°C. These small differences rarely matter in practice — home ovens themselves commonly swing 10–15°C around the set temperature — so use the nearest standard setting and rely on colour, spring and a skewer test for doneness.