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Includes gas mark and common baking presets.
Oven Temperature Converter
Type any oven temperature and convert it between Celsius, Fahrenheit and gas mark. Tap a preset for common baking temperatures, or convert your recipe's units in one step.
-Celsius
-Fahrenheit
-Gas mark
The formulas
- Fahrenheit to Celsius: (F - 32) x 5 / 9.
- Celsius to Fahrenheit: (C x 9 / 5) + 32.
- Gas mark: looked up from the standard table below, matched to the nearest half mark.
The gas mark table
- Gas 1 = 140°C (275°F)
- Gas 2 = 150°C (300°F)
- Gas 3 = 170°C (325°F)
- Gas 4 = 180°C (350°F)
- Gas 5 = 190°C (375°F)
- Gas 6 = 200°C (400°F)
- Gas 7 = 220°C (425°F)
- Gas 8 = 230°C (450°F)
- Gas 9 = 240°C (475°F)
Worked example
A recipe calling for 350°F converts to (350 - 32) x 5 / 9 = about 177°C. Ovens work in round steps, so bakers use 180°C, which is gas mark 4.
Fan oven adjustment
Fan and convection ovens move hot air around, cooking food faster and more evenly. Reduce the recipe's conventional temperature by about 20°C (for example, 180°C becomes 160°C fan). If a recipe already gives a fan temperature, use it as written.
Planning estimate only. Results use the list prices shown and may differ from your actual bill. Terms
Frequently asked questions
What is gas mark 4 in Celsius?
Gas mark 4 is 180°C, about 350°F. It is the most common baking temperature for cakes and cookies.
Should I reduce the temperature for a fan oven?
Yes, by about 20°C. A recipe that says 200°C conventional needs about 180°C in a fan or convection oven. Many modern recipes already list both temperatures.
Why do American recipes use Fahrenheit?
The US kept the Fahrenheit scale for everyday use while most of the world moved to Celsius. Fahrenheit's finer degrees, 180 of them between freezing and boiling water, once made it practical for cooking before digital thermometers.
Is the conversion exact?
The math is exact, but ovens are not. Thermostats work in round steps and real ovens can run 10 to 15 degrees off, so rounding 177°C to 180°C is perfectly fine. An oven thermometer is the best upgrade for accurate baking.
What is the lowest gas mark?
Gas mark 1, which is 140°C (275°F), used for slow cooking and keeping food warm. Some older cookers go down to gas mark 1/2, about 130°C.