๐ Oven Temperature Converter
* Gas mark isn't an exact formula โ it's an approximate guide based on a conventional reference table.
Convert oven temperatures between Celsius (ยฐC), Fahrenheit (ยฐF), and gas mark โ the UK gas oven dial notation commonly seen in British recipes. Useful for baking a foreign recipe on an oven calibrated in a different unit.
How to use
- Choose the unit you're entering the temperature in (Celsius or Fahrenheit).
- Enter a temperature and the Celsius, Fahrenheit, and nearest gas mark values are shown automatically.
How the calculation works
Celsius and Fahrenheit convert exactly with ยฐF = ยฐC ร 9/5 + 32 and ยฐC = (ยฐF โ 32) ร 5/9. Gas Mark is the temperature scale used on British gas ovens, numbered 1 to 9 (with ยผ and ยฝ at the low end). It is not defined by a formula; it is used through reference tables giving the approximate temperature for each setting. This tool uses the table ยผ = 110ยฐC, ยฝ = 120ยฐC, 1 = 140ยฐC, 2 = 150ยฐC, 3 = 160ยฐC, 4 = 180ยฐC, 5 = 190ยฐC, 6 = 200ยฐC, 7 = 220ยฐC, 8 = 230ยฐC, 9 = 240ยฐC, and shows whichever mark is closest to the temperature you enter. Domestic ovens often run hotter or cooler than their dial says. If a converted temperature browns too much or too little, adjust while keeping an eye on it.
Worked example
A British recipe calling for 425ยฐF 1. To Celsius: (425 โ 32) ร 5 รท 9 โ 218ยฐC 2. Nearest Gas Mark: 220ยฐC = Gas Mark 7 The 350ยฐF common in American recipes is about 177ยฐC, closest to Gas Mark 4 at 180ยฐC.
Things to be aware of
- The Gas Markโtemperature correspondence is a conventional guide; sources differ by a few degrees.
- Fan (convection) ovens are often recommended to run somewhat cooler than a recipe states. Check your oven's manual.
- Actual oven temperature varies between models; an oven thermometer gives the most reliable reading.
- Preheating time and shelf position affect results as much as the temperature does.
FAQ
What is a gas mark?
A temperature scale used on UK gas ovens, expressed as numbers from 1 to 9 (plus smaller values like 1/4 and 1/2). This tool shows the nearest gas mark from a standard reference table.
How accurate is the gas mark conversion?
Gas mark doesn't correspond to Celsius via an exact formula โ it's based on a conventional reference table, so this tool shows the closest matching gas mark as a guide.
Should I use the same temperature for a fan/convection oven?
Generally, fan ovens are often recommended to run about 20ยฐC (roughly 20ยฐF) lower than the recipe's stated temperature. Check your oven's manual as well.