Oven Temperature Converter
Type a temperature in any unit and instantly see it in Fahrenheit, Celsius, Gas Mark, and fan-oven settings.
📖 How it works & FAQGas Mark conversion chart
| Gas Mark | Fahrenheit | Celsius | Oven |
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Convert between Fahrenheit, Celsius and Gas Mark
Recipes are written for whatever oven the author grew up with. American cookbooks use Fahrenheit, most of the world uses Celsius, and older British recipes call for a Gas Mark. This converter turns any one of those into the other two instantly, so you can set your dial with confidence no matter where the recipe came from.
The core formula is simple: C = (F − 32) × 5 / 9, and to go back the other way, F = C × 9 / 5 + 32. Gas Mark doesn't follow a clean formula, so we match your temperature to the standard gas mark chart below, where each mark rises roughly 25°F at a time from Gas Mark 1 (275°F) upward.
Fan and convection ovens
A fan (convection) oven circulates hot air, so it cooks faster and more evenly than a conventional oven. The usual rule is to lower the temperature by about 20°C (25°F) from what a conventional recipe states, or to keep the same temperature and shorten the time. This tool shows the reduced fan setting automatically so you don't have to do the subtraction in your head.
How to use it
- Type the temperature your recipe gives into the box.
- Pick the unit that number is in — Fahrenheit, Celsius, or Gas Mark.
- Read the converted values for the other units in the result cards.
- Check the Fan / Convection card if you have a fan-assisted oven.
- Use the gas mark chart to double-check the closest dial setting.
FAQ
- What is Gas Mark 4 in Fahrenheit and Celsius?
- Gas Mark 4 is 350°F or 180°C — the most common all-purpose baking temperature, often called a moderate oven.
- How do I adjust for a fan oven?
- Reduce the conventional temperature by about 20°C (25°F). For example, 180°C conventional becomes roughly 160°C fan.
- Is the conversion exact?
- Fahrenheit and Celsius convert exactly with the formula. Gas marks are rounded to the nearest standard dial setting, so treat them as the closest practical match. Values are estimates for cooking, not precision measurement.
- Does this send my data anywhere?
- No. Every calculation runs entirely in your browser — nothing is uploaded or stored.