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 |
Oven Temperature Chart
The Celsius column is the setting recipes and oven dials actually use; the exact column is the raw formula, (°F − 32) × 5/9. They differ because metric oven settings were standardized independently, not derived from the formula.
| Fahrenheit | Celsius (recipe setting) | Exact °C | Gas mark | Typically used for |
|---|---|---|---|---|
| 275°F | 140°C | 135°C | 1 | low and slow: meringues, drying, tough cuts |
| 300°F | 150°C | 148.9°C | 2 | slow roasts, cheesecake, custards |
| 325°F | 170°C | 162.8°C | 3 | pound cakes, dense bakes, braises |
| 350°F | 180°C | 176.7°C | 4 | the default: most cakes, cookies, casseroles |
| 375°F | 190°C | 190.6°C | 5 | muffins, quick breads, chicken pieces |
| 400°F | 200°C | 204.4°C | 6 | roasted vegetables, pizza at home, pastry |
| 425°F | 220°C | 218.3°C | 7 | roast potatoes, crisp skin, biscuits |
| 450°F | 230°C | 232.2°C | 8 | artisan bread, high-heat roasting |
| 475°F | 240°C | 246.1°C | 9 | pizza stones, finishing, flatbreads |
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.