Oven Temperature Converter
Convert oven settings between Celsius, Fahrenheit and UK gas marks, with the fan (convection) equivalent.
Updated October 2026
Gas mark reference
| Gas mark | °C | °F | Fan °C |
|---|---|---|---|
| ¼ | 110 | 225 | 90 |
| ½ | 120 | 250 | 100 |
| 1 | 140 | 275 | 120 |
| 2 | 150 | 300 | 130 |
| 3 | 160 | 325 | 140 |
| 4 | 180 | 350 | 160 |
| 5 | 190 | 375 | 170 |
| 6 | 200 | 400 | 180 |
| 7 | 220 | 425 | 200 |
| 8 | 230 | 450 | 210 |
| 9 | 240 | 475 | 220 |
This oven temperature converter turns a setting between Celsius, Fahrenheit and UK gas marks, and shows the matching fan (convection) temperature so you can move a recipe between ovens without guessing.
Fan ovens run hotter for the same dial number, so the usual rule of thumb is to drop about 20 °C from a conventional recipe temperature (then round to the nearest 10 °C). Gas marks are the numbered dial scale used on many UK cookers; the table below is the standard conventional mapping.
How to use it
- 1Enter the oven temperature or gas mark you have.
- 2Choose the scale: °C, °F or Gas mark.
- 3Read the conventional and fan equivalents, the nearest gas mark, and use the reference table below for quick lookups.
Frequently asked questions
What is Gas Mark 4 in Celsius?+
Gas Mark 4 is 180 °C, or 350 °F, on a conventional oven. The fan equivalent is about 160 °C.
How much lower is a fan oven?+
As a rule of thumb, set a fan (convection) oven about 20 °C lower than a conventional recipe temperature, then round to the nearest 10 °C. Always check your appliance manual — some ovens already adjust for you.
What is 350 °F in Celsius / gas mark?+
350 °F is about 177 °C, which maps to Gas Mark 4 (180 °C / 350 °F on the standard UK table).
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