Oven Temperature Converter
Convert oven temperatures between Celsius, Fahrenheit and gas mark.
Results update as you type.
How it works
Recipes travel across borders, and their oven temperatures rarely arrive in the units your oven uses. This oven temperature converter moves any setting between Celsius, Fahrenheit and the UK gas mark scale so you can follow a recipe from anywhere without a mistranslation that burns or undercooks your food. The stakes are real because oven temperature governs how food browns, rises and sets. A cake baked forty degrees Fahrenheit too hot can dome and crack; bread proved and baked too cool stays pale and dense. Celsius-to-Fahrenheit conversions are exact, but gas mark is a coarser scale, so this tool flags gas-mark results as approximate and encourages you to lean on an oven thermometer for anything sensitive. Knowing that gas mark 4 is roughly 180°C or 350°F — the classic all-purpose baking temperature — is the kind of anchor this converter makes instant. The conversions work because Celsius and Fahrenheit are linear scales related by the formula °F = °C × 9/5 + 32, which the tool inverts to go the other way. Gas mark, by contrast, steps in intervals of about 25°F starting near 250°F for gas mark 1, so the converter approximates it by rounding to the nearest mark. Home cooks with a Fahrenheit oven following a metric recipe, bakers decoding a vintage gas-mark cookbook, and anyone cooking across measurement systems reach for an oven temperature converter to set the dial with confidence.
°F = °C × 9/5 + 32; °C = (°F − 32) × 5/9; gas ≈ round((°F − 250) / 25)
Celsius and Fahrenheit are exact linear scales: multiplying Celsius by nine-fifths and adding thirty-two gives Fahrenheit, and reversing that recovers Celsius. Gas mark is different — it is a coarse dial where roughly every 25 Fahrenheit degrees is one mark, anchored so that gas mark 0 sits near 250°F. The converter first reduces any input to Fahrenheit, then applies the target formula, rounding for gas mark because the scale is stepped rather than continuous. That is why gas-mark results are approximate and pair best with a real oven thermometer.
Source:Standard temperature scale definitions
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, from and to.
- 2
Adjust the options
Fine-tune any options to match your situation.
- 3
Read your result
Converted temperature 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 figure by nine-fifths, or 1.8, and then add thirty-two. So 180°C becomes 356°F, which recipes usually round to 350°F, and 200°C becomes 392°F, rounded to 400°F. This linear formula is exact, so the only approximation is the rounding cooks apply to reach a tidy oven-dial number. The converter does the arithmetic instantly in either direction so you never have to guess.
Why is the gas mark conversion approximate?
Gas mark is a stepped scale rather than a continuous one, where each mark spans roughly 25 Fahrenheit degrees and gas mark 1 sits near 275°F. Because a single mark covers a small range of real temperatures, converting an exact Celsius or Fahrenheit value to a gas mark means rounding to the nearest step. That is why the tool labels gas-mark results as approximate and why an oven thermometer is worth using for precise baking.
What is gas mark 4 in Celsius and Fahrenheit?
Gas mark 4 is about 180°C or 350°F, the classic moderate oven temperature used for a huge range of cakes, biscuits and roasts. It is the setting most general-purpose recipes assume when they simply say a moderate oven. Higher marks run hotter — gas mark 6 is roughly 200°C — and lower marks cooler, with each step changing the temperature by about 25°F or 15°C.
Should I adjust the temperature for a fan oven?
Yes. Fan or convection ovens circulate hot air and cook more efficiently, so a common rule is to lower the temperature by about 20°C, or roughly 25 to 40°F, compared with a conventional recipe, or to shorten the time instead. This converter handles the unit change but not the fan adjustment, so make that reduction yourself after converting, then watch the food and use a thermometer to confirm.
How accurate are home oven thermostats?
Many home ovens run 10 to 30 degrees Fahrenheit hotter or cooler than the dial claims, and they can have hot spots that bake unevenly. Because of this, treat any converted figure as a target rather than a guarantee, especially for delicate baking. An inexpensive oven thermometer placed inside lets you see the true temperature and calibrate your dial, which matters far more than the small rounding in a unit conversion.