Gas mark 8
230°C · 450°F · 210°C fan
Very hot oven — searing a roast at the start, bread.
Gas mark 8 in every scale
| Gas mark | 8 |
| Fahrenheit | 450°F (exact — gas mark 8 is defined as this) |
| Celsius, conventional oven | 230°C (the arithmetic conversion is 232.2°C; recipes round it) |
| Celsius, fan oven | 210°C |
| Fahrenheit, fan oven | 410°F |
| Description | Very hot |
Frequently asked questions
What is gas mark 8 in Celsius?
230°C in a conventional oven, or 210°C in a fan oven.
What is gas mark 8 in Fahrenheit?
450°F, exactly — gas mark 8 is defined as 450°F.
Why is gas mark 8 called 230°C when 450°F is 232.2°C?
Because 232.2°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 -2.2 degree difference is well inside the accuracy of a domestic thermostat.
What is gas mark 8 used for?
Very hot — searing a roast at the start, bread.
The settings either side
| Gas mark | Fahrenheit | Celsius | Fan / convection | |
|---|---|---|---|---|
| 7 | 425°F | 220°C | 200°C fan | Hot |
| 8 | 450°F | 230°C | 210°C fan | Very hot |
| 9 | 475°F | 240°C | 220°C fan | Very hot |
The full chart, and why the three scales disagree →
All oven temperatures · 230°C to °F precisely · Cooking measurements