Oven Temperatures: °F, °C & Gas Marks
Updated August 15, 2026
350°F equals 177°C, or gas mark 4 — the "moderate oven" most recipes mean by default. For fan (convection) ovens, reduce the stated temperature by about 25°F / 15–20°C, or keep the temperature and expect things done sooner.
| Fahrenheit | Celsius | Gas mark | Old-book name |
|---|---|---|---|
| 250°F | 121°C | ½ | Very slow |
| 275°F | 135°C | 1 | Very slow |
| 300°F | 149°C | 2 | Slow |
| 325°F | 163°C | 3 | Slow-moderate |
| 350°F | 177°C | 4 | Moderate |
| 375°F | 190°C | 5 | Moderate-hot |
| 400°F | 204°C | 6 | Hot |
| 425°F | 218°C | 7 | Hot |
| 450°F | 232°C | 8 | Very hot |
| 475°F | 246°C | 9 | Very hot |
The fan-oven rule
Convection fans move heat onto the food faster, so a fan oven runs effectively hotter than its dial. The standard correction: drop 25°F (15–20°C) from any conventional-oven recipe, and start checking early. British recipes often list both ("200°C/180°C fan") — the second number already includes the correction.
Your dial is probably lying anyway
Home ovens routinely run 25°F hot or cold of the dial and swing further as they cycle. A $10 oven thermometer hung from the middle rack tells you your oven's real personality once, and every recipe benefits forever. If cookies always burn at the stated time, the answer is usually the dial, not the recipe.
Quick answers
- What is 350°F in Celsius?
- 177°C — commonly rounded to 175°C or 180°C, and gas mark 4. All three land the same bake.
- What is 180°C in Fahrenheit?
- 356°F — recipes mean 350°F. The 6-degree difference is well inside an oven's normal wobble.
- Do I adjust the temperature for convection roasting?
- Same rule: about 25°F lower, or keep it and shave time. Convection shines for roasting and browning; skip the fan for delicate custards and soufflés.