Oven temperature conversion chart
Every common oven setting in one chart — °C, °F, fan and gas mark side by side. Gas mark 4 is 180°C, 350°F, or 160°C fan. The full table is below, followed by the three rules that explain it.
The complete chart
| Gas mark | Conventional °C | Fan °C | Fahrenheit | Description |
|---|---|---|---|---|
| 1 | 140°C | 120°C | 275°F | Very cool / slow |
| 2 | 150°C | 130°C | 300°F | Cool |
| 3 | 160°C | 140°C | 325°F | Warm |
| 4 | 180°C | 160°C | 350°F | Moderate |
| 5 | 190°C | 170°C | 375°F | Moderately hot |
| 6 | 200°C | 180°C | 400°F | Hot |
| 7 | 220°C | 200°C | 425°F | Hot |
| 8 | 230°C | 210°C | 450°F | Very hot |
| 9 | 240°C | 220°C | 475°F | Very hot / searing |
The three rules behind the chart
1. °F = °C × 9/5 + 32. That's the exact Celsius-to-Fahrenheit formula — so 180°C is (180 × 1.8) + 32 = 356°F, rounded to 350°F on most dials.
2. Fan ovens run ~20°C cooler. A fan circulates hot air, cooking faster, so drop about 20°C from any conventional temperature — or keep the temperature and cut the time by ~10%.
3. Gas marks rise in ~10–20°C steps. Each gas mark is a fixed temperature; between two marks, round to the nearest.
Quick reference: the settings people search most
| You have | It equals |
|---|---|
| 350°F | 180°C, gas mark 4, 160°C fan |
| 400°F | 200°C, gas mark 6, 180°C fan |
| 425°F | 220°C, gas mark 7, 200°C fan |
| 180°C | 350°F, gas mark 4, 160°C fan |
| 200°C | 400°F, gas mark 6, 180°C fan |
Frequently asked questions
What is 180°C in gas mark and Fahrenheit?
180°C is gas mark 4 and 350°F (160°C in a fan oven).
What is the difference between fan and conventional oven temperature?
A fan oven runs about 20°C cooler than conventional for the same result, because circulating air cooks faster.
What is gas mark 6 in Celsius and Fahrenheit?
Gas mark 6 is 200°C, 400°F, or 180°C in a fan oven.
How do I convert Celsius to Fahrenheit for an oven?
Multiply the Celsius by 1.8 and add 32. So 200°C = (200 × 1.8) + 32 = 392°F, rounded to 400°F on most dials.