Gas mark 3
170°C · 325°F · 150°C fan
Warm oven — rich fruit cakes, milk puddings.
Gas mark 3 in every scale
| Gas mark | 3 |
| Fahrenheit | 325°F (exact — gas mark 3 is defined as this) |
| Celsius, conventional oven | 170°C (the arithmetic conversion is 162.8°C; recipes round it) |
| Celsius, fan oven | 150°C |
| Fahrenheit, fan oven | 302°F |
| Description | Warm |
Frequently asked questions
What is gas mark 3 in Celsius?
170°C in a conventional oven, or 150°C in a fan oven.
What is gas mark 3 in Fahrenheit?
325°F, exactly — gas mark 3 is defined as 325°F.
Why is gas mark 3 called 170°C when 325°F is 162.8°C?
Because 162.8°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 7.2 degree difference is well inside the accuracy of a domestic thermostat.
What is gas mark 3 used for?
Warm — rich fruit cakes, milk puddings.
The settings either side
| Gas mark | Fahrenheit | Celsius | Fan / convection | |
|---|---|---|---|---|
| 2 | 300°F | 150°C | 130°C fan | Cool |
| 3 | 325°F | 170°C | 150°C fan | Warm |
| 4 | 350°F | 180°C | 160°C fan | Moderate |
The full chart, and why the three scales disagree →
All oven temperatures · 170°C to °F precisely · Cooking measurements