Oven Temperature Converter
Type into any box. Fan oven temperatures are worked out for you, since almost every recipe is written for a conventional oven.
Common settings
The fan oven adjustment
A fan oven should be set about 20 °C lower than a recipe written for a conventional oven. Circulating air transfers heat to food considerably faster, so 180 °C in a fan oven cooks roughly like 200 °C conventional. Almost every recipe and cookbook quotes conventional temperatures unless it says otherwise, which is why cakes brown too quickly and edges dry out when the number is followed literally in a fan oven. Some manufacturers suggest reducing the time by around 10% instead — do one or the other, not both.
Full oven temperature chart
| Conventional °C | Fan °C | °F | Gas mark | Description |
|---|---|---|---|---|
| 110 | 90 | 225 | ¼ | Very cool — meringues |
| 140 | 120 | 275 | 1 | Cool — slow casseroles |
| 150 | 130 | 300 | 2 | Cool |
| 160 | 140 | 325 | 3 | Warm — rich fruit cakes |
| 180 | 160 | 350 | 4 | Moderate — most baking |
| 190 | 170 | 375 | 5 | Moderately hot |
| 200 | 180 | 400 | 6 | Fairly hot — roasting |
| 220 | 200 | 425 | 7 | Hot — pastry, roast potatoes |
| 230 | 210 | 450 | 8 | Very hot |
| 240 | 220 | 475 | 9 | Very hot — pizza, bread |
Your oven is probably lying
Domestic ovens are routinely out by 10–20 °C, and some by considerably more. The thermostat measures air near the sensor, not the temperature where your food sits.
A cheap oven thermometer, left on the middle shelf, is the single most useful piece of baking equipment most people do not own. Preheat to 180 °C, wait twenty minutes, and see what it actually reads. If it runs 15 °C cool, you now know to set 195 °C — which explains a great deal about cakes that never quite bake through.
Other things worth knowing: ovens have hot spots, so rotate trays halfway through; opening the door drops the temperature by 20–30 °C and it takes minutes to recover; and the top shelf runs hotter than the bottom in a conventional oven, while a fan oven is much more even, which is its real advantage.
How to use the Oven Temperature Converter
- Type the temperature your recipe gives into the matching box.
- Read across for the other scales.
- If your oven has a fan, use the fan figure.
Popular exact answers
Worked answers to the questions people ask most, each with the arithmetic shown.
Frequently asked questions
What is 180°C in Fahrenheit?
350 °F, which is gas mark 4 — the single most common baking temperature. In a fan oven, use 160 °C.
What is gas mark 6?
200 °C conventional, 180 °C fan, or 400 °F. It is the usual roasting temperature.
Should I lower the temperature or the time for a fan oven?
Lower the temperature by 20 °C, which is what almost all recipes assume. Reducing the time by about 10% instead also works. Doing both will undercook the dish.
Why do my cakes brown too fast?
Most often a fan oven set to the conventional temperature. Failing that, an oven running hot — check with a thermometer — or a tin placed too high in the oven.
Are gas marks the same everywhere?
The scale is standard in the UK and Ireland. Gas mark 1 is 140 °C and each mark up adds roughly 14 °C, with quarter and half marks below 1 for very low settings.
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Last reviewed September 4, 2026. Results are estimates for general information only.