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). Essential for UK baking.
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.
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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