Convert any oven temperature between Celsius, fan (convection) ovens, Fahrenheit and gas marks. Type a number or pick a gas mark and every other scale updates, including a starting point for an air fryer. The full chart is below the converter.
Fan ovens run hotter, so fan = conventional minus 20 °C. Air fryer: a common rule of thumb is 20 °C (about 25 °F) lower than a conventional oven and about 20% less time — check early the first time.
| Gas mark | °C | °C fan | °F | Oven |
|---|---|---|---|---|
| ¼ | 110 | 90 | 225 | Very cool |
| ½ | 120 | 100 | 250 | Very cool |
| 1 | 140 | 120 | 275 | Cool |
| 2 | 150 | 130 | 300 | Cool |
| 3 | 170 | 150 | 325 | Warm |
| 4 | 180 | 160 | 350 | Moderate |
| 5 | 190 | 170 | 375 | Moderately hot |
| 6 | 200 | 180 | 400 | Fairly hot |
| 7 | 220 | 200 | 425 | Hot |
| 8 | 230 | 210 | 450 | Very hot |
| 9 | 240 | 220 | 475 | Very hot |
Frequently asked questions
What is 180 °C in a fan oven?
160 °C. Fan ovens circulate hot air, so they cook about 20 °C hotter than the dial says; lower a conventional recipe temperature by 20 °C.
What is gas mark 4 in a fan oven?
Gas mark 4 is 180 °C conventional, which is 160 °C in a fan oven (350 °F).
What is 350 °F in Celsius?
350 °F is about 177 °C, which recipes round to 180 °C (gas mark 4, 160 °C fan).
How do I convert an oven recipe to an air fryer?
A common starting point is 20 °C (about 25 °F) lower and roughly 20% less time, shaking or turning halfway. Air fryers vary, so check a few minutes early the first time.