Oven Temperature Converter & Conversion Chart (°C, °F, Fan and Gas Mark)
Convert American Fahrenheit recipes, European Celsius recipes, and UK gas marks. You can also convert a conventional recipe for a fan, convection, or fan-forced oven.
Quick answer: 350°F = 180°C = 160°C fan = gas mark 4 (common recipe-chart settings).
Convert an Oven Temperature
Edit any one field. It becomes the source and immediately updates the others.
Recipe setting: 350°F is commonly paired with 180°C; the exact conversion is 176.7°C.
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Oven Temperature Conversion Chart
| Heat | Conventional °C | Conventional °F | Fan °C | Fan °F (exact) | Gas mark |
|---|---|---|---|---|---|
| Very cool | 110°C | 225°F | 90°C | 194°F | 1/4 |
| Very cool | 120°C | 250°F | 100°C | 212°F | 1/2 |
| Cool | 140°C | 275°F | 120°C | 248°F | 1 |
| Cool | 150°C | 300°F | 130°C | 266°F | 2 |
| Moderate | 160°C | 325°F | 140°C | 284°F | 3 |
| Moderate | 180°C | 350°F | 160°C | 320°F | 4 |
| Moderately hot | 190°C | 375°F | 170°C | 338°F | 5 |
| Moderately hot | 200°C | 400°F | 180°C | 356°F | 6 |
| Hot | 220°C | 425°F | 200°C | 392°F | 7 |
| Hot | 230°C | 450°F | 210°C | 410°F | 8 |
| Very hot | 240°C | 475°F | 220°C | 428°F | 9 |
| Very hot* | 260°C | 500°F | 240°C | 464°F | 10* |
*Gas mark 10 appears on some charts and appliances but is not universal; check the oven manual. Fan °F is the mathematical conversion of the listed fan °C, so a manufacturer may recommend a nearby dial setting.
How to Use the Converter
- Choose conversion mode: Recipe chart for practical dial settings or Exact formula for mathematical temperature conversion.
- Set the fan rule: Use the default 20°C reduction, a 25°F reduction, no adjustment, or a custom amount.
- Edit one temperature field: Enter Celsius, Fahrenheit, fan Celsius, fan Fahrenheit, or gas mark; the other fields update immediately.
- Read the explanation: Check the source, exact result, recommended setting, gas-mark match, and selected fan rule shown below the fields.
Formulas and Assumptions
- Fahrenheit from Celsius: °F = °C x 9 / 5 + 32.
- Celsius from Fahrenheit: °C = (°F - 32) x 5 / 9.
- Default fan rule: fan °C = conventional °C - 20. The selected alternative is applied in one temperature scale and then converted, avoiding mixed 20°C/35°F claims.
- Recipe mode pairs common dial values, so 350°F recommends 180°C / gas mark 4 while still showing the exact 176.7°C result. Exact mode preserves the formula result.
- Gas marks use a common recipe chart, with gas mark 4 treated as 350°F / 180°C.
Sources used to verify the conversion chart include Good Food's conversion guide, Which?'s oven temperature table, and Smeg UK's oven conversion chart.
Methodology and review: Maintained by Starlight Robotics; last reviewed 12 July 2026. Recipe mode follows the common gas-mark chart above and exact mode uses the displayed formulas. Reputable charts can differ by 5–10°C because they round to different dial increments, choose different fan reductions, or follow manufacturer-specific guidance.
Worked Oven Conversion Examples
350°F to Celsius, fan, and gas mark (recipe mode)
Enter 350°F. Exact calculation: (350 − 32) × 5/9 = 176.7°C. Recommended dial setting: 180°C conventional, 160°C fan, gas mark 4.
180°C to Fahrenheit and fan (exact and recipe)
Enter 180°C. Exact calculation: 180 × 9/5 + 32 = 356°F; with the default fan rule, 180 − 20 = 160°C fan (320°F). Recipe mode recommends the common 350°F dial pairing.
200°C to Fahrenheit and gas mark (recipe mode)
Enter 200°C. Exact calculation: 200 × 9/5 + 32 = 392°F. Recommended dial settings: 400°F and gas mark 6.
160°C fan back to conventional (default fan rule)
Enter 160°C fan. Reverse the 20°C reduction: 160 + 20 = 180°C conventional. Recipe mode also recommends 350°F and gas mark 4.
Oven Conversion FAQs
What is 350°F in a fan oven?
In recipe mode, 350°F is 180°C conventional and 160°C fan (about 320°F fan), using the common 20°C reduction. Check your recipe and oven manual because some charts round the fan Fahrenheit setting to 325°F.
What is 180°C in Fahrenheit?
Exactly 180°C is 356°F. Recipe charts commonly round it to the familiar 350°F dial setting.
Is a fan oven the same as convection or fan-forced?
Usually. Fan oven, convection oven, and fan-forced oven generally describe an oven that circulates hot air, although appliance modes and fan strength vary.
How do I convert a fan temperature back to conventional?
Reverse the selected fan reduction. With the default 20°C rule, add 20°C to the fan setting, so 160°C fan becomes 180°C conventional.
Should I reduce temperature or cooking time for convection?
Follow the recipe or appliance manual first. A common approach is to lower the temperature and begin checking earlier; temperature conversion alone does not determine cooking time.
Why is exact 180°C equal to 356°F but recipes say 350°F?
The formula gives 356°F, but recipe charts use convenient oven-dial increments and pair 180°C with 350°F. Both are valid when clearly labelled as exact or practical.
Do I need to convert when a recipe already lists fan temperature?
No, not if you are using the fan or convection mode the recipe specifies. Do not reduce an already-adjusted fan temperature again.
Why do oven conversion charts differ by 5–10°C?
Charts round formula results to different dial increments and may use different fan assumptions. Oven calibration and manufacturer guidance also vary.
Is this converter private?
Yes. It runs in your browser, and your temperature input is not sent anywhere.
Practical Oven Guidance
- Preheat fully, especially for cakes, bread, and pastry.
- Check the appliance manual for its recommended convection adjustment and whether it applies automatic conversion.
- Use an oven thermometer if food repeatedly cooks too quickly or slowly; the displayed temperature may differ from the cavity temperature.
- Judge doneness independently using appearance, texture, and a suitable food thermometer where food safety matters.
- Check earlier with a fan oven. Convection may cook faster, and changing temperature does not automatically prescribe a new cooking time.
How it works
The converter treats the field you edit as the source, normalizes it to a conventional Celsius value, applies the selected fan rule, and updates every other field. Recipe mode may recommend a nearby chart setting while preserving the exact formula result in the explanation.