Free Oven Temperature Converter (+ Guide)

What is an oven temperature converter?

An oven temperature converter changes an oven setting between Fahrenheit, Celsius, fan ovens and gas marks.

The US uses °F, most of the world °C, and older UK and Irish recipes use gas marks.

How the scales fit together

The formula from NIST's Handbook 44 is °C = (°F − 32) ÷ 1.8.

Gas marks follow Which?'s table, the UK consumer association:

A worked example

Here's the example the calculator loads: 350°F.

(350 − 32) ÷ 1.8 = 176.7°C, which recipes round to 180°C. In a fan oven, that's about 160°C, and it's gas mark 4.

The fan oven rule

A fan, or convection, oven blows the hot air around, so food cooks faster. Which? puts it at about 20°C cooler for the same result.

So if a recipe says 200°C and you have a fan oven, set 180°C. If it already says "fan", don't take off more.

Mistakes to avoid

These are the ways a bake goes wrong.

• Taking 20°C off a recipe that already gives the fan temperature
• Converting 180°C exactly to 356°F instead of the usual 350°F
• Skipping the preheat, so the bake starts in a cool oven
• Opening the door early, which drops the temperature fast

Who is the oven temperature converter for?

It's for anyone baking from a recipe written somewhere else, and these tools help around it.

• Recipe scaler – for scaling the recipe too
• Cups to grams converter – for weighing instead of measuring
• Cooking converter – for every kitchen unit

Set the right number, and the recipe bakes the way it should.