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Oven temperature conversion
350°F = 177°C, which recipes round to 180°C, or gas mark 4. In a fan (convection) oven, recipes usually say about 160°C.
| °F | °C (exact) | °C (recipes) | Fan oven °C | Gas mark | Description |
|---|---|---|---|---|---|
| 250°F | 121.1 | 120°C | 100°C | 1/2 | Very cool |
| 275°F | 135 | 140°C | 120°C | 1 | Very low |
| 300°F | 148.9 | 150°C | 130°C | 2 | Low |
| 325°F | 162.8 | 160°C | 140°C | 3 | Moderately low |
| 350°F | 176.7 | 180°C | 160°C | 4 | Moderate |
| 375°F | 190.6 | 190°C | 170°C | 5 | Moderately hot |
| 400°F | 204.4 | 200°C | 180°C | 6 | Hot |
| 425°F | 218.3 | 220°C | 200°C | 7 | Hot |
| 450°F | 232.2 | 230°C | 210°C | 8 | Very hot |
| 475°F | 246.1 | 240°C | 220°C | 9 | Very hot |
Fan-oven values follow the usual UK recipe convention of about 20°C lower. Every oven runs a little differently, and an oven thermometer is the only way to know what yours actually does.
The formula
°C = (°F − 32) × 5 ÷ 9. °F = °C × 9 ÷ 5 + 32. Recipes round to the nearest 10°C or 25°F, because home ovens swing by more than that during a bake anyway.