F ↔ C ↔ Gas mark.
Converts between Fahrenheit, Celsius, and UK gas marks.
Common: 350 °F = 177 °C = gas mark 4 (moderate).
Recipe temperatures are one of the most common places US and international measurement systems collide, since a recipe written for one system rarely converts to a clean round number in the other.
350 °F = 177 °C = gas mark 4.
Fan ovens typically run ~20 °C (35 °F) hotter than a conventional oven at the same dial setting. Reduce the recipe temp accordingly.
Historical: many older UK ovens have a gas dial with marks 1–9 instead of a temperature dial.
Not always — many home ovens run 10-25°F off their displayed setting, so an oven thermometer is worth using if a recipe's exact temperature really matters.