Oven Temperature Converter

How to convert oven temperatures

1. Type the temperature from your recipe and choose its unit: Celsius, Celsius for a fan oven, Fahrenheit or gas mark.
2. Read the equivalent in every other unit, plus a description of the heat level.
3. Use the table for quick reference, or the air fryer line when adapting oven recipes.

Celsius, Fahrenheit, fan and gas marks

To convert Celsius to Fahrenheit, multiply by 9/5 and add 32: 180 °C is 356 °F, which recipes round to 350 °F. Recipes use rounded "standard" temperatures, so the table pairs them as cooks do (180 °C = 350 °F = gas mark 4) rather than exact mathematical equivalents. Gas marks, used on older British gas cookers, rise in steps of about 14 °C (25 °F) from gas mark 1 at 140 °C to gas mark 9 at 240 °C.

Fan ovens (convection ovens) circulate hot air, which cooks faster, so the usual advice is to set them about 20 °C lower than a conventional recipe temperature (or 25 °F lower in the US). Many modern recipes state both. Air fryers are small, powerful convection ovens; reduce the temperature by about 15 °C (25 °F) and start checking around 20% earlier. Oven thermostats are often off by 10–20 degrees, so an inexpensive oven thermometer is worth having. The converter works in your browser.