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Oven Temperature Converter

Turn any oven setting into °F, °C, fan and gas mark, so a recipe from anywhere works in your oven.

Fahrenheit
350°F
Celsius
177°C
Fan oven
157°C fan
Gas mark
4

For a US convection oven, the usual starting point is 325°F (25°F lower), checking about 10 minutes early.

Oven temperature chart

Gas mark°F°C°C fan
1/4225110–
1/2250120–
1275140120
2300150130
3325170 (or 160)140
4350180160
5375190170
6400200180
7425220200
8450230210
9475240220
10500260–

Sources: gas mark, °F and °C from Wikipedia's gas mark table; fan temperatures from Which?.

The formula

°C = (°F − 32) × 5 ÷ 9, and °F = °C × 9 ÷ 5 + 32. Recipes round the result to the nearest 5 or 10 degrees, which is why 350°F appears as 180°C rather than 177°C.

Fan, convection and conventional ovens

A fan moves hot air around the food, so it cooks faster at the same setting. British and Australian recipes often give both a conventional and a fan temperature; American recipes usually assume a conventional oven. Reduce the temperature only if the recipe was written for a conventional oven and yours uses the fan.

Frequently asked questions

What is 350°F in Celsius?

350°F is about 177°C, which recipes usually round to 180°C. In a fan oven that's about 160°C, and on a gas oven it's gas mark 4.

How much lower should a fan oven be?

Fan ovens are usually set about 20°C lower than a conventional oven (Which?). For US convection ovens, King Arthur Baking suggests 25°F lower and checking about 10 minutes early. If a recipe already gives a fan temperature, don't reduce it again.

What is gas mark 4?

Gas mark 4 is 180°C or 350°F, the most common setting for cakes and cookies.

Why do sources disagree on gas mark 3?

Gas marks were never defined to the exact degree. Wikipedia's table gives 170°C for gas mark 3, while Which? gives 160°C. Ovens also vary, so an oven thermometer is the most reliable fix.

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