Oven Temperature Converter
Convert oven temperatures between Fahrenheit, Celsius, and gas mark instantly.
Exact math conversion — for the rounded setting your oven dial and recipes actually use, see the table below.
Type in either box — the other updates automatically.
| Fahrenheit | Celsius (recipe/oven setting) | Gas Mark |
|---|---|---|
| 275°F | 140°C | 1 |
| 300°F | 150°C | 2 |
| 325°F | 170°C | 3 |
| 350°F | 180°C | 4 |
| 375°F | 190°C | 5 |
| 400°F | 200°C | 6 |
| 425°F | 220°C | 7 |
| 450°F | 230°C | 8 |
| 475°F | 240°C | 9 |
Browse Specific Temperatures
Frequently Asked Questions
Why doesn't 350°F convert exactly to 180°C?
The math gives 176.7°C, but oven dials and recipes round that to 180°C by convention — gas mark, Celsius, and Fahrenheit oven scales were each standardized separately, not derived from one exact formula. Recipes use the rounded, practical values, not the raw math.
What is a gas mark?
Gas mark is the temperature scale used on older and UK/Irish gas ovens, running from 1 (lowest) to 9 (highest). It maps to specific Fahrenheit and Celsius settings, shown in the table above, rather than being a direct unit conversion.
Does a fan (convection) oven need a different temperature?
Yes, typically. A common rule of thumb is to lower the temperature by about 20°C (or 25°F) from a conventional oven recipe, or reduce by roughly 10% — since fan ovens circulate hot air and cook faster at the same setting. Check your oven's manual, since the exact adjustment varies by model.