Gas Mark Converter
Convert UK Gas Mark (1-10) to Celsius, Fahrenheit, and fan oven temperatures.
Last updated: 2026-07-19
UK gas oven scale
Conversions for Gas Mark 4
Gas Mark
Gas Mark 4
UK gas oven scale
Celsius
180°C
°C, conventional oven
Fahrenheit
356°F
°F, used in US
Fan oven
160°C (fan)
°C, fan-assisted (20°C lower)
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Gas Mark is the UK gas oven temperature scale (1-10), used almost exclusively in Britain — the US and most of Europe don't use it. This converter switches between Gas Mark, Celsius (°C), Fahrenheit (°F), and fan oven temperatures (fan is typically 20°C lower than conventional).
Gas Mark Conversion Chart (UK Oven Temperatures)
Gas Mark to Celsius, Fahrenheit and fan oven — the full UK oven temperature chart.
| Gas Mark | Celsius (°C) | Fahrenheit (°F) | Fan oven (°C) |
|---|---|---|---|
| Gas Mark 1 | 140 | 275 | 120 |
| Gas Mark 2 | 150 | 300 | 130 |
| Gas Mark 3 | 165 | 325 | 145 |
| Gas Mark 4 | 180 | 350 | 160 |
| Gas Mark 5 | 190 | 375 | 170 |
| Gas Mark 6 | 200 | 400 | 180 |
| Gas Mark 7 | 220 | 425 | 200 |
| Gas Mark 8 | 230 | 450 | 210 |
| Gas Mark 9 | 245 | 475 | 225 |
| Gas Mark 10 | 260 | 500 | 240 |
Frequently asked questions
What is Gas Mark 4 in Celsius?
Gas Mark 4 = 180°C (350°F). It is the most common baking temperature in UK recipes, equivalent to a moderate oven.
What is Gas Mark 6 in Celsius?
Gas Mark 6 = 200°C (400°F, fan 180°C). It is a hot oven, commonly used for roasting meat and vegetables, and baking bread or pizzas.
Why is the fan oven temperature lower?
Fan-assisted (convection) ovens circulate hot air, cooking more evenly and faster. Recipes usually set the fan temperature 20°C lower than the conventional temperature for the same result.
Does the US use Gas Mark?
No. Gas Mark is a UK and Commonwealth system. American ovens use Fahrenheit only, so US recipes never reference Gas Mark — this is exactly why a dedicated UK converter is useful.
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