Oven Temperature Conversion Calculator
Convert oven temps between °C, °F and gas mark.
Results update as you type.
How it works
Recipes from different countries give oven temperatures in different scales, and this calculator converts between Celsius, Fahrenheit, and gas mark so you can follow any recipe. You enter a temperature and select which scale it is in, and it instantly shows the equivalent in all three. Celsius is standard in most of the world, Fahrenheit is used in the United States, and gas mark is common on older British and Irish gas ovens, numbered so that each mark is 25 Fahrenheit degrees apart. The Celsius-Fahrenheit conversion is the familiar formula, while gas mark 1 corresponds to 275°F with each higher mark adding 25°F, so gas mark 4, a very common baking temperature, is 350°F or about 180°C. Converting accurately matters in baking especially, where temperature strongly affects rise, browning, and texture, and a misread scale can ruin a cake. This tool removes the guesswork and the need to remember conversion charts. Keep in mind that oven thermostats are often inaccurate and that fan or convection ovens typically run about 20°C, or roughly 25 to 50°F, hotter in effect, so many recipes advise lowering the set temperature for a fan oven. Enter your temperature and its scale to convert oven temperatures across all three systems.
°F = °C × 9/5 + 32; Gas mark = (°F − 250) / 25
Celsius and Fahrenheit convert with the standard formula, multiplying Celsius by nine-fifths and adding 32. Gas mark, used on many British ovens, rises by 25 Fahrenheit degrees per mark, with gas mark 1 at 275°F, so gas mark equals the Fahrenheit temperature minus 250, divided by 25. The calculator shows all three scales from any input.
Source:Culinary reference
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter temperature and from unit.
- 2
Adjust the options
Fine-tune any options to match your situation.
- 3
Read your result
Celsius updates instantly as you type — no button to press.
Frequently asked questions
How do I convert Celsius to Fahrenheit for an oven?
Multiply the Celsius temperature by nine-fifths and add 32. So 180°C becomes 356°F. The calculator does this instantly and also gives the gas mark. This is the same formula used for any temperature conversion, and it is essential for following recipes written in a different scale from your oven.
What is a gas mark?
Gas mark is a temperature scale used on many British and Irish gas ovens. Gas mark 1 equals 275°F, and each higher mark adds 25°F, so gas mark 4 is 350°F. It is a simple numbered scale rather than a degree measurement, and this calculator converts it to and from Celsius and Fahrenheit for you.
What is gas mark 4 in Celsius?
Gas mark 4 is 350°F, which is about 180°C, one of the most common baking temperatures for cakes, cookies, and many dishes. This calculator confirms the exact conversion, but 180°C, 350°F, and gas mark 4 are all effectively the same moderate oven setting used throughout countless recipes.
Do I adjust for a fan or convection oven?
Yes. Fan, or convection, ovens circulate hot air and cook more efficiently, effectively running hotter than a conventional oven at the same setting. Many recipes advise reducing the temperature by about 20°C, or roughly 25 to 50°F, for a fan oven, or shortening the cooking time. This converter handles scale conversion; apply the fan adjustment separately.
Why are oven temperatures often inaccurate?
Oven thermostats can be off by a significant margin, and temperature varies between the top, bottom, and center of the oven. This means a converted temperature is a starting point, not a guarantee. Using an oven thermometer to check the true temperature helps ensure your baking matches the recipe regardless of the scale you converted from.