Free Tool

Oven Temperature Converter

Convert between Celsius, Fahrenheit, and Gas Mark — with automatic fan oven reduction so you never have to do the maths mid-recipe.

Input Unit

Temperature

Common °C presets

Fan / convection oven

Reduces the temperature by 20°C. Most recipes are written for conventional ovens.

Fan oven rule: reduce the temperature by 20°C (about 36°F) and check bakes 5–10 minutes earlier than the recipe says.
Gas marks aren't linear — Gas 4 is 180°C, Gas 7 is 220°C. Use the chart, not arithmetic.
Oven thermometer: most domestic ovens are off by 10–20°C. If your bakes are consistently under or over, check yours.

Conventional oven

180°C

356°F

Gas Mark 4

Medium — most cakes, brownies, loaves

Fan / Convection

160°C

320°F

Start checking 5–10 minutes before the recipe time.