Gas mark 9
240°C · 475°F · 220°C fan
Very hot oven — pizza, the hottest most domestic ovens reach.
Gas mark 9 in every scale
| Gas mark | 9 |
| Fahrenheit | 475°F (exact — gas mark 9 is defined as this) |
| Celsius, conventional oven | 240°C (the arithmetic conversion is 246.1°C; recipes round it) |
| Celsius, fan oven | 220°C |
| Fahrenheit, fan oven | 428°F |
| Description | Very hot |
Frequently asked questions
What is gas mark 9 in Celsius?
240°C in a conventional oven, or 220°C in a fan oven.
What is gas mark 9 in Fahrenheit?
475°F, exactly — gas mark 9 is defined as 475°F.
Why is gas mark 9 called 240°C when 475°F is 246.1°C?
Because 246.1°C is not a number an oven dial can be set to. Recipes round to the nearest ten, and the rounded figure is the convention everywhere — the -6.1 degree difference is well inside the accuracy of a domestic thermostat.
What is gas mark 9 used for?
Very hot — pizza, the hottest most domestic ovens reach.
The settings either side
The full chart, and why the three scales disagree →
The other gas marks
- Gas mark 1/4 — 110°C, 225°F
- Gas mark 1/2 — 130°C, 250°F
- Gas mark 1 — 140°C, 275°F
- Gas mark 2 — 150°C, 300°F
- Gas mark 3 — 170°C, 325°F
- Gas mark 4 — 180°C, 350°F
- Gas mark 5 — 190°C, 375°F
- Gas mark 6 — 200°C, 400°F
All oven temperatures · 240°C to °F precisely · Cooking measurements