°F, °C or gas mark in — all three out, plus the fan-oven equivalent.
Recipes travel across borders, but ovens don’t always speak the same language. American recipes use Fahrenheit, most of the world uses Celsius, and British recipes often use gas marks. This converter turns any one into the other three instantly, and tells you how to adjust for a fan (convection) oven so nothing over-browns.
| Fahrenheit | Celsius | Gas mark | Description |
|---|---|---|---|
| 275°F | 135°C | 1 | Very cool |
| 325°F | 165°C | 3 | Moderate (slow) |
| 350°F | 177°C | 4 | Moderate |
| 375°F | 190°C | 5 | Moderately hot |
| 400°F | 200°C | 6 | Hot |
| 425°F | 218°C | 7 | Hot |
| 450°F | 232°C | 8 | Very hot |
As a rule of thumb, reduce the temperature by about 20°C (25°F) for a fan or convection oven, since the moving air cooks more efficiently. The converter shows the fan equivalent automatically.
Gas mark 4 is about 350°F (177°C) — the most common all-purpose baking temperature.
Often the oven runs hot or the recipe assumed a conventional oven while yours is fan-forced. Lower the temperature 20°C/25°F and check a little early.