Oven Temperature Converter -- Fahrenheit, Celsius & Gas Mark

Convert Oven Temperature

Enter a temperature in any unit and see instant conversions to Fahrenheit, Celsius, and Gas Mark. Use the quick presets for common baking temperatures.

Common Baking Temperatures Reference

This table shows the most common oven temperatures used in recipes from different countries, along with what they are typically used for.

How Oven Temperature Conversion Works

Fahrenheit to Celsius

C = (F - 32) x 5/9

Celsius to Fahrenheit

F = (C x 9/5) + 32

Gas Mark Conversion

Gas Mark is a temperature scale used on gas ovens primarily in the United Kingdom, Ireland, and some Commonwealth countries. The scale was introduced in 1943 by the company Radiation. Gas Mark 1 equals 275°F (135°C), and each subsequent mark adds 25°F (approximately 14°C).

Gas Mark = (F - 250) / 25

For fractional gas marks below 1 (such as ¼ and ½), the formula produces values like 0 and 0.5, which are standard Gas Mark settings on British ovens.

Tips for Converting Oven Temperatures

Rounding for Practical Use

Oven dials are not precision instruments. When converting, round to the nearest 5°C or 10°F. A difference of a few degrees will not meaningfully affect your results. For example, 350°F converts to 176.67°C mathematically, but 180°C is the standard setting used in practice.

Fan / Convection Oven Adjustment

If your recipe specifies a conventional oven temperature and you are using a fan (convection) oven, reduce the temperature by about 20°C (or 25°F). Fan ovens circulate hot air, which cooks food more evenly and efficiently. For example, a recipe calling for 200°C in a conventional oven should be set to approximately 180°C in a fan oven.

Altitude Considerations

At higher altitudes (above 3,000 feet / 900 meters), you may need to increase the oven temperature by 15--25°F. Lower air pressure at altitude means liquids evaporate faster and leavening agents expand more, so a slightly hotter oven helps set the structure of baked goods before they over-rise and collapse.

Frequently Asked Questions

How do I convert Fahrenheit to Celsius for cooking?

Subtract 32 from the Fahrenheit temperature, then multiply by 5/9. For example, 350°F becomes (350 - 32) x 5/9 = 176.7°C, which is rounded to 180°C in most recipes. This converter does the math for you instantly.

What is Gas Mark and how does it relate to Fahrenheit?

Gas Mark is a temperature scale used on gas ovens in the UK and some Commonwealth countries. Gas Mark 1 equals 275°F (135°C), and each increment adds 25°F. Gas Mark 4 (350°F / 180°C) is a moderate oven -- the most common baking temperature.

What temperature is a moderate oven?

A moderate oven is 325°F to 375°F (165°C to 190°C / Gas Mark 3 to 5). The most common moderate setting is 350°F (180°C / Gas Mark 4), used for cakes, cookies, muffins, and most general baking.

What temperature is a hot oven?

A hot oven is 400°F to 450°F (200°C to 230°C / Gas Mark 6 to 8). This range is used for bread, pizza, roast potatoes, pastries, and high-heat roasting that develops crispy exteriors.

Should I adjust temperature for a fan oven?

Yes. Fan (convection) ovens circulate hot air, so they cook more efficiently. Reduce the temperature by about 20°C (25°F) compared to what the recipe states for a conventional oven. Some modern fan ovens do this adjustment automatically -- check your oven manual.

Does this converter store my data?

No. All conversions run entirely in your browser. No data is sent to any server, and nothing is stored.

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Privacy

This converter runs entirely in your browser. No temperature data is transmitted or stored anywhere. All calculations happen client-side using plain JavaScript.

Oven Temperature Converter FAQ