OvenConvert is a free tool that converts oven temperatures between gas mark, Celsius, Fahrenheit, and fan oven settings instantly. It exists because millions of people search for "what is 180 in gas mark" every month — and the answer should be one click away, not buried in a recipe blog.
If you've ever tried to follow a recipe from an American cookbook on a UK gas oven — or your grandmother's recipe that just says "gas mark 6" when your oven shows Celsius — you know the frustration. Most conversion sites bury the answer behind walls of text and ads. We wanted something clean, fast, and instant.
The converter uses the standard gas mark scale established by the British gas industry, along with the standard Celsius-to-Fahrenheit formula (°F = °C × 9/5 + 32) and the fan oven rule of thumb (subtract 20°C from conventional). Enter any temperature in any unit and see all four conversions at once.
Gas mark conversions are based on the widely accepted standard scale. The fan oven adjustment of -20°C is the general guideline used by most oven manufacturers, though individual ovens may vary slightly. Always use these conversions as a starting point and adjust based on your own oven's behaviour.
Got feedback or spotted an error? Get in touch.