Oven Temperature Conversion Chart (F, C & Gas Marks)
The most common baking temperature, 350°F, equals about 175–180°C or gas mark 4 — and for a fan (convection) oven you reduce it by about 25°F. Here’s the full oven temperature conversion chart for Fahrenheit, Celsius and gas marks, plus the fan-oven adjustment, so you can bake any recipe no matter how the temperature is written.
The Quick Version
- 350°F = 175–180°C = gas mark 4 (the most common baking temp).
- Fan/convection oven: reduce by about 25°F (20°C).
- Each gas mark ≈ 25°F apart.
- Use an oven thermometer — most ovens run off by 15–25°F.
Oven temperature conversion chart
| Fahrenheit | Celsius | Gas Mark | Description |
|---|---|---|---|
| 275°F | 140°C | 1 | Very low |
| 300°F | 150°C | 2 | Low |
| 325°F | 165°C | 3 | Moderately low |
| 350°F | 175–180°C | 4 | Moderate (most common) |
| 375°F | 190°C | 5 | Moderately hot |
| 400°F | 200°C | 6 | Hot |
| 425°F | 220°C | 7 | Hot |
| 450°F | 230°C | 8 | Very hot |
| 475°F | 245°C | 9 | Very hot |
Fan / convection ovens: reduce the Fahrenheit figure by about 25°F (or the Celsius by about 20°C). For example, 350°F conventional ≈ 325°F fan.
Frequently asked questions
What is 350°F in Celsius?
About 175–180°C, or gas mark 4 — the most common baking temperature. In a fan oven, use ~160°C.
How do you convert for a fan oven?
Reduce the conventional temperature by about 25°F (20°C), since circulating air bakes faster.
What are gas mark temperatures?
Gas 2 = 300°F/150°C, gas 4 = 350°F/180°C, gas 6 = 400°F/200°C, gas 7 = 425°F/220°C. Each mark ≈ 25°F apart.
Why is my oven inaccurate?
Most ovens run 15–25°F off and cycle on and off. An oven thermometer shows the real temperature so you can adjust.
More baking basics
See all our baking tips for beginners, or learn how to tell when a cake is done.
