Recipes from different countries list oven heat differently. Enter a temperature in any one unit to see the other two.
Fahrenheit and Celsius convert with the standard linear formula (°F = °C × 9/5 + 32). Gas mark, used mainly in UK and Irish recipes, doesn't convert with a formula — it maps to a fixed table of Celsius/Fahrenheit bands defined by oven manufacturers, so this calculator looks up the nearest standard gas mark for a given temperature.
Source: Gas mark equivalents follow the UK Gas Mark standard used by British and Irish recipe publishers and appliance manufacturers.
Gas mark 4 is 180°C, which is 350°F — one of the most common baking temperatures.
The Fahrenheit/Celsius formula is mathematically exact. Gas mark is not a formula-based conversion; it's matched to the nearest standard band on a gas cooker dial, so treat it as an approximation.
Most manufacturers suggest lowering a conventional recipe temperature by about 20°C (25°F) for fan/convection ovens, or reducing cooking time by about 10% instead — check your oven's manual for its specific guidance.
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