How to use temperature conversions without guessing
Conversion charts are fast, but good baking decisions still depend on the oven type, recipe sensitivity, and the way your own oven browns. Use the chart as a baseline, then pressure-test it with the checks below.
Convert the number, then sanity-check the recipe type
A direct Fahrenheit, Celsius, or Gas Mark conversion gets you close, but delicate bakes, high-sugar items, and fan ovens often need a judgment call.
Adjust for fan ovens separately
Many fan ovens run effectively hotter because moving air speeds surface heat transfer. The classic 20C or 25F reduction is a starting point, not a guarantee.
Use practical settings, not exact decimals
Domestic ovens rarely hold laboratory precision. Round to a realistic dial setting and rely on doneness cues when the chart lands between marks.
Watch browning before assuming the temperature is wrong
Fast browning can come from pan color, sugar content, rack position, convection airflow, or an overactive thermostat, not just a bad conversion chart.
Oven Temperature Converter
Convert between Gas Mark, Celsius and Fahrenheit. Find the nearest named temperature level too.
Gas Mark
4
Celsius
180 deg C
Fahrenheit
350 deg F
Common oven temperatures
Full Gas Mark Reference Table
| Gas Mark | °C | °F |
|---|---|---|
| 0.25 | 110 | 225 |
| 0.5 | 120 | 250 |
| 1 | 140 | 275 |
| 2 | 150 | 300 |
| 3 | 160 | 325 |
| 4 | 180 | 350 |
| 5 | 190 | 375 |
| 6 | 200 | 400 |
| 7 | 220 | 425 |
| 8 | 230 | 450 |
| 9 | 240 | 475 |
| 10 | 260 | 500 |
Why oven conversion charts are only the first step
Temperature systems describe the same target heat in different languages, but recipes are written for real kitchens with different ovens, thermostats, and airflow patterns. A chart can get you into the right zone, yet texture and browning still depend on how your own oven behaves.
That is especially true when moving between US recipes, older British cookbooks, and fan-assisted European ovens. Conversions are necessary, but they are not the whole story.
Where the common fan-oven rule works well
For many cakes, cookies, tray bakes, and roasted vegetables, dropping the conventional temperature by about 20C is a sensible baseline. It keeps you from overbrowning the surface while convection does its work.
Recipes that are delicate, very rich, or intentionally baked low and slow often need a softer touch. In those cases, start conservative and inspect earlier rather than trusting a one-size-fits-all rule.
Signs you should override the chart
If a cake domes too fast, cookies brown on the base before the center sets, or a roast colors long before its interior is ready, your oven behavior matters more than the printed conversion.
The best conversion process is chart first, observation second. That is how you avoid repeating the same mismatch every time you use a recipe from another region.
Conversion cautions
- - Do not treat Gas Mark labels like exact scientific values. Older charts often round to the nearest practical setting.
- - Do not apply the same fan reduction to every recipe without checking browning and bake speed.
- - Do not assume a digital oven display is perfectly calibrated.
- - Do not forget rack position when a recipe suddenly seems too hot or too cool after conversion.
Specific oven conversion utilities
These utility pages stay useful for one-off lookups. Use them when you already know the conversion question, and use the hub guidance above when the issue is really about oven behavior rather than a missing number.
Guides that explain the edge cases
Use these articles when a plain lookup chart is not enough, especially if you are converting between fan and conventional ovens or following older Gas Mark recipes in a US kitchen.